Since this question comes up very often, I've set up a central "How Do I Title My Hot Rod" page.
The page is set up in "wiki" format. This means that anyone (including you) can edit the page. You don't even have to log in.
If you have any information on registering/titling hot rods, please add your info to this page: How to Title a Hot Rod
For more info on the wiki, see this page: Wiki Home Page