“Step 1 - Boot into OS X LION
Step 2 - Insert Windows 7 disc
Step 3 - Run Boot Camp and make your Windows Partition the size you want and complete the wizard. It says to start the Windows 7 installer, but we will be working around this.
Step 4 - The Mac will reboot - right after the chime, hold down the ‘Option’ button until you see the screen showing Machintosh HD and the Windows Disc.
Step 5 - Use the arrow key to highlight the Windows CD, then press the eject key.
Step 6 - Insert the Windows XP CD
Step 7 - Install Windows XP
Step 8 - Install Bootcamp Drivers from your SnowLeopard DVD from inside windows.
Step 9 - Run Apple Software Updates in Windows a couple of times. This should get you to the latest Boot Camp drivers that work with your mac.
Step 10 - Do your windows updates and install Microsoft Security Essentials - just to be safe
Step 11 - Enjoy a lighter weight windows that boot much faster.”
