If I followed the guide over at Life Hacker located here, and followed EXACTLY as it said, I wouldn't need to buy anything extra right? The stuff I bought there would cover everything I need for the PC to run? I am thinking about doing that if my current PC can't run Leopard and if I can pull in some cash.

I would only use it to build the PC, there is another easier guide on Life Hacker to install Leopard without hacking. That is here

Just wondering,