I used DOSBOX to install and play Dark Forces and it works perfectly fine. Now I'm enjoying this game from 1995 (!!!) with my kids who are 5 and 7. For those who don't know how to install it, read this thread and you'll get all the information you'll need to play Dark Forces on a PC (XP or Vista). I have the original Dark Forces CD, Dark Forces II and Jedi Outcast.