Making Things Difficult

So, I finally decided it's time to get off my ass and work on the LSM page again. Figured I'd start with installing phpBB, the standard generic PHP-based forum. Simple to configure, free... can't go wrong. Right?

Well, I came across a problem. LSM's hosting only allows one SQL database. That spot is currently being used by my home-grown content management system, which is kind of important. So... now I get to figure out how to write a forum FROM SCRATCH. Or at least steal appropriate someone's code.

I'd just gotten myself all excited over figuring out how I might make an alumni database work. Now this... this is a little more daunting. I don't doubt that it's possible, but I also don't doubt that it'll be buggy as hell. I just hate to disappoint. Shout-out to all web geeks: any help here? Where can I find my holy grail of forum code?

I guess the bright side is that my users a.) will be able to access the forum with their site login, and b.) will *have* to sign up if they want access to the member forums!

Update, 6/9/06: Thanks to Sheryl's and Dan's patient explanations, I now have a brand-spankin' new forum installed on the LSM site! Now all I have to do is write a post about how to sign up, how to play nice, etc; add a forum link to the main site; and email the board of directors so they can be my guinea pigs to test the thing. :-)