The 1.1 official patch (And all PMess builds, which are dne upon it) ensure compatibility with WinXP, but if you have problems still, also you can set the game's exes (Sim,Shell and SH2) to compatibility with Win 98SE
SH2 with lots of mods is still an interesting game to play, no doubt. I had some more work dne for SH2 (A random campaign based upon Rossbach's generator, correcting some bugs and improving a bit the missions) but never released it as SH3 came out. Wonder if there is some interest in it.... :hmm: