The pagefile is an extension of RAM on your HD. (If you have 4GB RAM + 4GB pagefile, your total virtual memory is 8GB, though paging is much slower than real RAM). I generally don't suggest reducing the pagefile, it helps. But if you're concerned about free space on your hard disk, here's how to reduce/eliminate paging:
As you can see, you may let your system automatically manage everything for you, or you can select a custom size for your pagefile, or disallow paging. Hope this helped!
This is the weirdest thing, I definitely do not remember putting in that link to the tutorial...
Very nice tutorial though nonetheless - like all good tutorials on this site. Thumbs up to Brink.