I've never used Parallels, but my girlfriend has it on her iMac. I installed Theme Hospital for her but when you try to play it the mouse goes absolutely crazy, flying from edge to edge. When I put Parallels in a window I could see what was happening. There were two cursors on screen; the Theme Hospital one and another one. Whenever the other (normal XP style) one hit and edge of the window the Theme Hospital one would jump to there, and then they'd swap around a bit when I moved it back. What's going on? Also, is there an easier way to put Parallels in a window? The only way I know so far is to drop the resolution from standard in XP, then press cmd+Q and cancel.