Default Need help with Cricket flashed GS3

Forgive me if this question has already been asked. I've tried searching xda and Google with no real answers to my specific question. I have a Sprint GS3. I had it flashed to cricket. I am rooted and I'm running M.O.A.R. 4.1.2. It's a great ROM but I'm used to AOSP. I had to flash a touchwiz ROM in order for the cricket guys to flash the phone because they had no idea how to flash a 4.3 ROM But apparently it can be done. Anyways my question is, is there a way to backup all the cricket settings from my phone and flash a new 4.4 AOSP or 4.3 TW rom to the phone. Then restore the cricket settings so that I don't have to pay cricket or attempt to re-flash the settings myself. I would attempt to flash the cricket settings myself but i have not found a very detailed tutorial on flashing a AOSP GS3 rom to cricket. Any help would be appreciated. Thanks again.