Let's start off with the best mod hands down — one in which a Resident Evil 2 meme becomes reality. Yep, you can now hear DMX's X Gon' Give It To Ya, rather than the original soundtrack music, every single time Mr. X chases you around the mansion.
This one requires a good deal of work, as it isn't available as a straight mod through any of the usual sites. Instead, you've got to download it through a file hosting service and then manually make changes to get the song to play.
The links and files have been removed a few times already, but they keep popping back up. This is why we've linked to the instructional post above instead of directly to the mod.