Sorry for posting so many things in the wrong place, I'll try to learn from that.
But anyway, I got a new computer with Vista Home Premium or something like that and KotOR, Jedi Outcast, and Jedi Academy all have been working great. Got them running on the first try AND my save games from XP all work.
1 problem so far is that in the title screen of KotOR, Malak is kind of lagging while the mouse cursor isn't skipping or anything.
"All too easy."