Using Chameleon as your bootloader, you can boot an infinite amount of operating systems on your PC. It's simple to use a separate hard drive for each operating system. Install multiple operating systems on separate hard drives. Go to CMOS Setup Utility and choose Advanced BIOS Features . Select Hard Disk Boot Priority . Move your Chameleon OS X hard drive to top of list. Boot into Chameleon and choose your Operating System. The following guide will show you how to put OS X Snow Leopard and Windows 7 on the same hard drive . You can then use Chameleon to select either Snow Leopard or Windows 7 at boot time. It's a bit trickier, as the Windows installer will set itself as the active partition automatically. You have to manually set the OS X partition active at the end of the process. UPDATE: The latest MultiBeast will take care of choosing boot0hfs instead of boot0 to automatically boot from hfs partition, even if it's inactive. STEP 1: PREPARING THE DRIVE First thing to...