Good-Bye Linux... For now; Need help

Hey guys,
I have a two hd computer, with a 20 and an 80, as you might know. I really need space for my win2k, and I don’t use linux too much. I need to totally uninstall that OS, and create a partition on that HD for my windows. I don’t think I have ever uninstalled an OS before… How would I do this?