There's no set answer to this question, some will play some won't, you might
want to try this on the games board. Click the Newsgroups button in Outlook
Express, select games from the list and try your question there.
They can give you a lot of tips but with DOS games or any other DOS
application, your mileage may vary as DOS is not a part of XP. It uses an
emulator. Plus, with games you have additional issues with sound, the most
prevalent problem because you don't load real mode drivers natively in XP,
they wouldn't be recognized and many cards no longer have real mode drivers.
The only way to be certain you will still be able to play those games is to
dual boot your current setup with XP assuming you have no problem playing
those games on XP.