I never thought I'd ever own an Apple computer. Now I do, but still the Apple OS doesn't really cut it for what I have to do for work. Hence, shortly after it's arrival, I went looking for some chicken blood, scented candles and a mysterious black robe: ready to perform the iHeresy and install Windows 7 on the brand new MacBook Pro!
Thanks to Apple, the heretical procedure is quite easy: the Snow Leopard installation disc you get with your Mac contains all Windows drivers you'll need and Mac OSX itself can do the partitioning work for you and setup the EFI bootloader correctly. In most cases the official installation guide will be perfectly fine to install Windows on a Mac PC.
However, if you'd like to setup a triple boot with Mac OSX, Windows and Linux, you'll need a more advanced solution: rEFIt, a toolkit that lets you customize the bootloader and boot from almost everything. Just download the latest package and install it in Mac OSX (it's a simple .dmg package). Refit won't show up as an installed application, but at the next reboot it should already show up instead of the gray Apple logo.
Now you're ready to partition your Apple's hard disk and install any other operating system. To do so, I suggest this great guide (which is slightly outdated, but nonetheless valid and very detailed). Essentially you'll have to follow this three steps...
