Tiberian Dawn and RA1 got XP patches, but I don't know if they still run on modern systems - probably not even with the XP patch.
Tiberian Sun and RA2 should still work, I think. I was playing them both a few years back.>>4339457>I really want to play TS, but even though it starts up, the framerate is so slow and jittery it is impossible to play.
That's actually normal. Tiberian Sun was EXTREMELY unoptimized. Even on a monster PC, it runs like shit once you get more units on screen.
RA2 was much better but it still had issues, particularly if you had a lot of Kirovs and Floating Saucers on screen (if you've ever played the map Lunatic Moon, you know what I'm talking about).
There's a patch for that, though:http://www.stuffhost.de/files/cnc/