Hi,
you can add the Software GIMP for Windows to your List
gimp-2.2.8-i586-setup.exe /SP- /VERYSILENT
and you need this GTK+ 2 runtime environment
gtk+-2.6.8-setup-1.exe /SP- /VERYSILENT
Silent Unistall GTK+
"C:\Program Files\Common Files\GTK\2.0\unins000.exe" /SP-/VERYSILENT
GIMP
"C:\Program Files\GIMP-2.0\unins000.exe" /SP- /VERYSILENT
greetings