I'm running Windows 7 but it doesn't quite work right with Starcraft. (Colors are messed up).
So I installed Windows XP Mode and I can get it to play starcraft but it changes the resolution to 640x480 and it does not stretch - so it's running in a tiny window in the middle of my screen. (If I resize the VM then the screen either goes blank, or it doesn't resize the contents)
Also the mouse isn't captured - the mouse can go inside/outside the virtual pc easily, and it should get stuck on the edges.