Yeah, I've never done that myself, but I know that if you make the index file a frameset, and then load the pages being viewed into that, the URL displayed will always be the domain with no "sites/boob/jackson.html" after it, but the downside is you can't have people link to anything but the root directory, and you can't bookmark anything else, either.

there's probably a different way of doing it in PHP or something, but I'm only about up to my toenails in that at this point... anyone else?