Runs perfectly for me, as rosenshyne said under Win98 compatability on Win XP Pro SP2. Works with fallout 1, 2 and BOS:FT
It's funny, I've never had any problems whatsoever to run FO or FO2 on XP. If you have problems, though, visit No Mutants Allowed and read the stickies before asking any help or you'll get sodomized. Trust me... :-(