You don't have to go into PitBull's code to change the font at all. It's under Global settings in the options menu. If you want access to more fonts, install SharedMedia - as mentioned, you can even add your own custom fonts by reading the "INSTRUCTIONS for MyMedia.txt" file. If you want more selections without adding them yourself, install ClearFont2.
Sorry for the Necro-post, but I'm going to continue using Ace-Pitbull for a little while while Ck irons the more annoying bugs with Rock. :)
I must be missing the option that lets me use my font selected with ClearFont. If someone could point me down the correct menu path, I'd appreciate it. Thanks.