Creating blocks on the profile page in 3.7

[Crrrazzzy]

I've been looking through the templates for 3.7, and we recently installed vBulletin's Blog product on our boards. I thought it would be a good idea to put a "Blog Entries" tab on the user's profile page, but I'm not sure where it's pulling the tab information from. I created a template for the tab data, but I'm not sure where the $blocks variable gets its information from or how it recognizes which block to insert. They're not stored in the database, so I'm at a complete loss.

Has anyone else tried to create a block for the profile page, and if so, can you please give me a few pointers on what I need to do?

Thanks a bunch.