I recently added ubuntu 8.04 to my existing Vista setup. Everything works fine and I dual boot no problem. However, I was unclear what I was doing in Ubuntu (this being my first time using it) and I changed some settings and moved things around that I now wish I hadn't.

Can someone tell me how I can re-install a fresh copy on the Ubuntu partition? I don't have any files to worry about losing - I've only had Ubuntu for a few days, but I sort of know what I'm doing now and I just want to start over fresh.

Any help is appreciated.