You'll want to read about hook_menu: http://drupaldocs.org/api/head/function/hook_menu GravyFace wrote:

I'm curious: how are default module paths assigned? I checked all the database tables that I thought would have this information but I can't find anything.

Specifically, I'm wondering how the Event module is setup at $base_url/event/foo/bar by default; I'd like to change this.