....well that was fun
My FTP program crashed halfway through the process of adding RSS and trashed the forum for a few minutes. I was able to get the basic forum running pretty quickly, but in a 'debug' mode which popped out header info, which trashed cookies, which killed any logins. Tough to fix things if you can't login. I knew enough php to manually edit out the debug lines and get it going again pretty close to the way it was.
So, I think RSS is working now. There are a couple dozen settings, but I left everything at default. Tell me if you think anything should change.