Is there any way to do it? I have a brand new MBP with Leopard. I installed XP Pro on it. Clamshell mode works perfectly in Leopard: I can close the lid, wake up the computer with an external keyboard, and my external monitor clicks on. But I can't get clamshell mode to work under XP. After doing some research, I've tried the following: (1) I tried "mirroring" the two monitors (i.e., the built-in and the external monitors), then telling XP to "do nothing" when I close the lid (i.e., not to go to sleep). That didn't work. There is no way to set the external monitor to act as the primary monitor; the option is "grayed out" on the display settings page. (2) After loading Leopard in clamshell mode, I tried restarting the computer into XP. I hit restart, held down the option key, but it didn't work. The computer sat there as if suspended. When I opened the lid, it immediately gave me the "welcome" screen in XP. Any advice? If I can just get this to work, my new MBP will officially earn the title Best Computer Ever. Thanks!