Yeah, so I'm basically taking over an open source project from someone else, and I set up a sourceforge project page but I have no idea how to upload the source code and project files and stuff. Help!
You're going to have to use either the CVS or SVN systems for code management. We use CVS for Construct and it does the job. You'll need a CVS client like TortoiseCVS or SmartCVS. Read up on the SourceForge help, I think they'd do a better job explaining it than me