Here's the thing, I've heard/read that you can get better performance by moving your Swap/Page file to a separate hard drive - a drive that is NOT your System drive.
There are a few other things that go with this. You would have to have the second drive on the other IDE channel as IDE can only communicate with one device on the channel at a time. Provided you have sufficient memory you're not going to be hitting the Swap/Page file very often.
Try it, if you feel that it is working better then keep it. If you don't like it, you're no worse off than before.