XP will run a great many odd things through Compatability Mode [which, if you don't know how to manipulate, is simple], and can run damned near anything with virtualization; I'm running DOS and Windows 2000 on my XP system [for Star Control 2 and internet security, respectively]. And that's on a Pentium 3. [Okay, a dual Pentium III-S 1.4ghz, but still.]