Identical setup execpt for new HD and os.
Did you copy back the libs, fonts, devs, etc that all these programs need?
I know I've run ImageFX 4, Pagestream 3 and Photogenics 2 on OS3.5. I think you either have botched assigns or missing files somewhere, or something. It shouldn't be too hard to get any of those programs working on 3.5.
Anyhow, I'd probably try re-installing the program. Should fix your problems. :-)