You have System Shock 2 running under XP?
I cannot persuade it to run at all - always gives an illegal operation during the CD check. Did you do anything special to make it run?
) is also nice for running some games that won't work with DOSBox. It lets your DirectX sound card appear as a SoundBlaster 16, AdLib, etc. Mainly useful for early Win95/98 games in my experience.