Partition magic is very easy to use, straightforward as far as where to click and stuff.

But, although I use it, the first time I tried using it without really reading the instructions and understanding enough, I screwed up the computer and had to reformat everything, which I hadn't backed up.

So, like Bobby said, whatever you do, backup everything you can't afford to lose, and read the instructions, understand what you're doing.

With partition magic you have to know what kind of partition you need to create, there's a few types, one is for separating OSs, the other is for data separation.

The person actually who could really help you with this is my dad, I'll get him to come over, he may have some suggestions.