Finally getting around to mt 4

So I've been playing around with Movable Type 4 again. It's a bit frustrating. I think my problems are with specifying the proper paths. The documentation is lacking, or I'm an idiot. Either way, I keep getting 500 errors whenever I try to publish anything other than the index pages. Scouring through the error logs, I can see that the wrong url is supplied despite my best efforts to figure out what and where mt wants to point. Once I figure it out, I'll put the rest of the pages up.