Hi Tony
You'll like this one:
http://www.fdisk.com/
Lots of info.
The only problem with having a partition with only the Windows folder (ie not your programs) is that many programs load dll's and vxd's into your windows folder. Not to mention the registry which is stored in there too.
So if you reinstall Windows you'll have to either backup your registry first, or setup all your programs from scratch again.
Cheers