When she's not tussling with Kim K, Shanna Moakler's got a new gig –- redoing the Miss California USA pageant.

TMZ hears that Shanna could be completely revamping the professional vampfest, removing all the cheesy nonsense that usually infests these events and "maximizing" the prize package. It's all to get a Miss California to be the next Miss USA -– which hasn't happened since 1992.

Shanna, of course, was Miss USA back in 1995, competing from New York state