I've tried the manually package at this link:
But when I go to reinstall Gimp, I click the costum button, but I can't check the Python enhanced.
I really wonder why PhotoComiX does insist on the GTK+ installer. If you only want to have Python support in GIMP - which does come with the gtk+ libs - this is not necessary.
So one thing you could try is to get rid of everything you've installed, and re-do the installation without the GTK+ installer. If this does succeed, this could indicate a conflict.
Otherwise, installing Python and the three add-on modules (pygtk, pycairo, pygobject) should be pretty smooth, I've never seen anything go wrong there.
pygtk is a python module (as are pycairo, pygobject and the various modules that do come with GIMP). Its installer does not care about GTK+.
When GIMP is run, its bin directory does become part of PATH, and thus PyGTK has no problems finding the GTK+ (and Glib etc) libraries that are located there.
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