Sudo complete save has a lot of challenges completed pretty much all clothes and customization stuff unlocked, except for some boards. I did get some of the harder to get boards though
also the both 1 and 2 are completed and the Bogos Binted Alien fella's have been erased.
and Roswell has been unlocked

No jack black though. and i didnt get all the V's and graffiti but still most of the good stuff is unlocked.