I had no problems running Infiltration on my Windows 7 64bit (Phenom II X4).
In fact, so far I've been able to run *every* single game I've wanted. This includes games such as Arcanum (1999), Planescape: Torment (1999), Age of Wonders (1998), Baldur's Gate (1998) and the likes.
Only for AoW I needed to tweak some stuff (
details), but other than that everything worked (surprisingly) well.
Oh, I also had problems with a Arcanum Savegame editor (I accidentally saved just before I died, stupid me). Solved that with VirtualBox and Windows XP.
Most of the problems I seem to be having with these kind of games are related to widescreen issues
But that's not Windows 7 specific.
As a sidenote, nowadays I don't even have a copy of INF anymore. I guess I could say I am "checking out" ...