Gimp

This entries are working for me using the installers from http://gimp-win.sf.net

   <package
       id="gimp"
       name="The Gimp"
       revision="0"
       reboot="false"
       priority="10">
       <check type="file" condition="exists" path="%PROGRAMFILES%\GIMP\bin\gimp-2.2.exe" />
       <install cmd="\\pdc2\install\packages\gimp\gimp-2.2.8-i586-setup.exe  SP- /SILENT /NORESTART /DIR=C:\Programme\GIMP">
           <exit code="0" />
       </install>
   </package>

   <package
       id="gimphelp"
       name="The Gimp help files"
       revision="0"
       reboot="false"
       priority="20">
       <check type="file" condition="exists" path="%PROGRAMFILES%\GIMP\share\gimp\2.0\help\de\index.html" />
       <install cmd="\\pdc2\install\packages\gimp\gimp-help-2-0.9-setup.exe  SP- /SILENT /NORESTART  /DIR=C:\Programme\GIMP">
           <exit code="0" />
       </install>
   </package>

   <package
       id="gtk"
       name="GTK"
       revision="0"
       reboot="false"
       priority="0">
       <check type="file" condition="exists" path="%COMMONPROGRAMFILES%\GTK\2.0\bin\libgtk-win32-2.0-0.dll" />
       <install cmd="\\pdc2\install\packages\gimp\gtk+-2.6.9-setup.exe SP- /SILENT /NORESTART">
           <exit code="0" />
       </install>
   </package>