Can't completely uninstall WordPress

I tried uploading a theme that was given to me by someone else. The files corrupted my site so I tried uninstalling WordPress manually (didn’t know you could do it through fantastico), but somehow there are still files there that won’t allow me to reinstall WordPress. Ugh. I have deleted every file associated with WordPress. But when I try reinstalling it, the error says that not more than one file can be installed in the same root directory.

Can anyone help?

Thanks,
Angela
http://stoptheforeclosure.com/