Cfrgtkky

The class is available here and a template here.
In the class, the following command, defines the image environment.

% Command to layout the portrait (must be 60mmx40mm) 

newcommandecv@Portrait[1]{%

  %% A frame as placeholder (with  some 1mm inner padding):

  pgfrect[stroke]{pgfxy(6.85,0.65)}{pgfxy(4.3,-6.3)}

  %% Actually a concrete digital image:

  pgfdeclareimage[interpolate=true,height=60mm,width=40mm]{portrait}{#1}

  pgfputat{pgfxy(6.77,0.5)}{pgfbox[left,top]{pgfuseimage{portrait}}}

}

Below I have a minimal example. How can I overload with my settings the image environment? E.g., modify the image size to 50mmx40mm and the frame accordingly as well.

%%

%% Copyright 2006-2011 Christoph P. Neumann, Bernd Haberstumpf

%%

%% This LaTeX file provides a template for a german CV.

%%

%% This file is free property; as a special exception the author

%% gives unlimited permission to copy and/or distribute it, with

%% or without modifications, as long as this notice is

%% preserved.

%%

%% This file is distributed in the hope that it will be useful,

%% but WITHOUT ANY WARRANTY, to the extent permitted by law;

%% without even the implied warranty of MERCHANTABILITY or

%% FITNESS FOR A PARTICULAR PURPOSE.

%%



documentclass[english]{ecv}

usepackage{blindtext}

% Dateiname: images/<portrait>.jpg

ecvPortrait{portrait}

ecvName{<Surname(s), Name>}



begin{document}



begin{ecv}



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Person

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvSec{hypertarget{hypertarget:ecvPerson}{ecvPerson}}



ecvEPR{Name}   {textsc{<Name>}, <Surname(s)>}

ecvEPR{Addresse}{<House number> <Street>ecvNewLine

                 <City>, <Postcode>, <Country>}

ecvEPR{Telephone}{<Area code>--<Telephone number>}

ecvEPR{Fax}{<Area code>--<Faxnumber>}

ecvEPR{E-Mail} {ecvHyperEMail{<E-Mail>}}

ecvEPR{Nationality}

                {<Nationality>}

ecvEPR{Date of birth}

                {<Date of birth>}



ecvBSec{Objective}

ecvEFR{}{blindtext[1]}                



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Profession

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSec{hypertarget{hypertarget:ecvProfession}{ecvProfession}}



% Chronologisch beginnend mit den juengsten Beschaeftigungen

ecvEFR{Period}{<Year>--<Year>}

ecvENR{Employer}

                {ecvBold{<Company name>}\

                 <House number><Street>, <City>, <Postcode>, <Country>}

%

ecvEFR{Project <From> until <To>}

                {<Topic>}

ecvENR{Position}{<Position held>}

ecvENR{Main responsibilities}

                {<List of activities>}



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Education

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSec{hypertarget{hypertarget:ecvEducation}{ecvEducation}}



% Universit"at

ecvEFR{Period}{<Year>--<Year>}

ecvENR{Accquired qualifications}

                {ecvBold{<Title>}}

ecvENR{Institute}

                {<Name of educational institution>}

ecvENR{Principal subjects}

                {<List of the major subjects>}

ecvENR{Minor subjects}

                {<List of minor subjects>}

ecvENR{Grade}   {Avarage grade <overall avarage grade>}

% Schule

ecvEFR{Period}{<Year>--<Year>}

ecvENR{Accquired qualifications}

                {<Title>}

ecvENR{Graduate school}

                {<Name of the school>}



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Research

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSec{hypertarget{hypertarget:ecvResearch}{ecvResearch}}



ecvEFB{Diploma thesis}{"`<Title of the diploma thesis>"' --- <Institute>}

ecvEFB{Seminar paper}{"`<Title of the seminar paper>"' 

                      --- <Institute>}



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Publications

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSec{hypertarget{hypertarget:ecvPublications}{ecvPublications}}



ecvEFR{Publication}{<Author>:

                     emph{<Title of the publication>}

                     <Name of the journal>. <Publisher>, 

                     <City>, <Year>}







%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Jobs

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSec{hypertarget{hypertarget:ecvJobs}{ecvJobs}}



ecvEFR{Period}{<Year>--<Year>}

ecvENR{Employer}

                 {ecvBold{<Name of the Company>}, <City>/<Country>}

ecvENR{Employment}

                 {<Type of the employment>}

ecvENR{Main responsibilities}

                 {<List of activities>

                 }



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Languages

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSec{hypertarget{hypertarget:ecvLanguages}{ecvLanguages}}



ecvERSub{First language}{ecvBold{English}}



ecvEBSub{Other languages}

                        {<Language> -- Read: <Degree>, Write: 

                         <Degree>, Talk: <Degree>}



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Language Travels

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSub{ecvLanguageTravels}



ecvEFR{Period}{<Date>--<Date>}

ecvENR{Place} {<City>/<Country>}

ecvENR{Vendor}

                {<Organizer>}

ecvENR{Certificate}

                {<Name of the accquired certificate>}





%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Abilities

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvPageBreak

ecvBSec{hypertarget{hypertarget:ecvAbilities}{ecvAbilities}}

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Abilities / social

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvEBSub{Social Skills}

                {<Description of the social strengths>

                }

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Abilities / organisational

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvEBSub{Organisational Skills}

                {<Description of organisational skills>

                }

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Abilities / professional

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBEBSub{Technical Skills}

                {<Description of technical skills>}

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Hobbies

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBEBSub{Hobbies}

                {<List of major hobbies and private interests>

                }



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Attachments

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSec{hypertarget{hypertarget:ecvAttachements}{ecvAttachements}}



ecvOVR         {<Lsit of all attachements>

                } 



end{ecv}



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Signature

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvSig{<Name>, <Surname(s)>}{<City>}



end{document}

end

You can use renewcommandecv@Portrait[1]{...} to overwrite the definition of ecv@Portrait

%%

%% Copyright 2006-2011 Christoph P. Neumann, Bernd Haberstumpf

%%

%% This LaTeX file provides a template for a german CV.

%%

%% This file is free property; as a special exception the author

%% gives unlimited permission to copy and/or distribute it, with

%% or without modifications, as long as this notice is

%% preserved.

%%

%% This file is distributed in the hope that it will be useful,

%% but WITHOUT ANY WARRANTY, to the extent permitted by law;

%% without even the implied warranty of MERCHANTABILITY or

%% FITNESS FOR A PARTICULAR PURPOSE.

%%



documentclass[english]{ecv}

usepackage{blindtext}

% Dateiname: images/<portrait>.jpg

ecvPortrait{portrait}

ecvName{<Surname(s), Name>}



makeatletter

% Command to layout the portrait (must be 60mmx40mm) 

renewcommandecv@Portrait[1]{%

  %% A frame as placeholder (with  some 1mm inner padding):

  pgfrect[stroke]{pgfxy(6.85,0.65)}{pgfxy(4.3,-5.3)}

  %% Actually a concrete digital image:

  pgfdeclareimage[interpolate=true,height=50mm,width=40mm]{portrait}{#1}

  pgfputat{pgfxy(6.77,0.5)}{pgfbox[left,top]{pgfuseimage{portrait}}}

}

makeatother



begin{document}



begin{ecv}



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Person

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvSec{hypertarget{hypertarget:ecvPerson}{ecvPerson}}



ecvEPR{Name}   {textsc{<Name>}, <Surname(s)>}

ecvEPR{Addresse}{<House number> <Street>ecvNewLine

                 <City>, <Postcode>, <Country>}

ecvEPR{Telephone}{<Area code>--<Telephone number>}

ecvEPR{Fax}{<Area code>--<Faxnumber>}

ecvEPR{E-Mail} {ecvHyperEMail{<E-Mail>}}

ecvEPR{Nationality}

                {<Nationality>}

ecvEPR{Date of birth}

                {<Date of birth>}



ecvBSec{Objective}

ecvEFR{}{blindtext[1]}                



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Profession

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSec{hypertarget{hypertarget:ecvProfession}{ecvProfession}}



% Chronologisch beginnend mit den juengsten Beschaeftigungen

ecvEFR{Period}{<Year>--<Year>}

ecvENR{Employer}

                {ecvBold{<Company name>}\

                 <House number><Street>, <City>, <Postcode>, <Country>}

%

ecvEFR{Project <From> until <To>}

                {<Topic>}

ecvENR{Position}{<Position held>}

ecvENR{Main responsibilities}

                {<List of activities>}



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Education

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSec{hypertarget{hypertarget:ecvEducation}{ecvEducation}}



% Universit"at

ecvEFR{Period}{<Year>--<Year>}

ecvENR{Accquired qualifications}

                {ecvBold{<Title>}}

ecvENR{Institute}

                {<Name of educational institution>}

ecvENR{Principal subjects}

                {<List of the major subjects>}

ecvENR{Minor subjects}

                {<List of minor subjects>}

ecvENR{Grade}   {Avarage grade <overall avarage grade>}

% Schule

ecvEFR{Period}{<Year>--<Year>}

ecvENR{Accquired qualifications}

                {<Title>}

ecvENR{Graduate school}

                {<Name of the school>}



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Research

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSec{hypertarget{hypertarget:ecvResearch}{ecvResearch}}



ecvEFB{Diploma thesis}{"`<Title of the diploma thesis>"' --- <Institute>}

ecvEFB{Seminar paper}{"`<Title of the seminar paper>"' 

                      --- <Institute>}



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Publications

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSec{hypertarget{hypertarget:ecvPublications}{ecvPublications}}



ecvEFR{Publication}{<Author>:

                     emph{<Title of the publication>}

                     <Name of the journal>. <Publisher>, 

                     <City>, <Year>}







%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Jobs

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSec{hypertarget{hypertarget:ecvJobs}{ecvJobs}}



ecvEFR{Period}{<Year>--<Year>}

ecvENR{Employer}

                 {ecvBold{<Name of the Company>}, <City>/<Country>}

ecvENR{Employment}

                 {<Type of the employment>}

ecvENR{Main responsibilities}

                 {<List of activities>

                 }



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Languages

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSec{hypertarget{hypertarget:ecvLanguages}{ecvLanguages}}



ecvERSub{First language}{ecvBold{English}}



ecvEBSub{Other languages}

                        {<Language> -- Read: <Degree>, Write: 

                         <Degree>, Talk: <Degree>}



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Language Travels

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSub{ecvLanguageTravels}



ecvEFR{Period}{<Date>--<Date>}

ecvENR{Place} {<City>/<Country>}

ecvENR{Vendor}

                {<Organizer>}

ecvENR{Certificate}

                {<Name of the accquired certificate>}





%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Abilities

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvPageBreak

ecvBSec{hypertarget{hypertarget:ecvAbilities}{ecvAbilities}}

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Abilities / social

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvEBSub{Social Skills}

                {<Description of the social strengths>

                }

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Abilities / organisational

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvEBSub{Organisational Skills}

                {<Description of organisational skills>

                }

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Abilities / professional

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBEBSub{Technical Skills}

                {<Description of technical skills>}

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Hobbies

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBEBSub{Hobbies}

                {<List of major hobbies and private interests>

                }



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Attachments

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvBSec{hypertarget{hypertarget:ecvAttachements}{ecvAttachements}}



ecvOVR         {<Lsit of all attachements>

                } 



end{ecv}



%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Signature

%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ecvSig{<Name>, <Surname(s)>}{<City>}



end{document}