[Rippa_MD]

I don't know how deep spb backup really get into the actual system files of the rom...but I can tell you the Nue3ROM is very different and better than the stock ROM. If you can do a backup of only contacts you should be fine. Maybe do two backups one with contacts and programs you installed and another with just contacts. load one at a time after you flash to Nue3ROM. if you see that is acting buggy with the backup of programs and contacts you will have to hard reset and just load the backup with just contacts and your programs one by one, finally backup again with spb.

hard reset = hold the two small dot o buttons together and press the reset button/circle with stylus. follow the onscreen directions and it will reload Nue3Rom back to your phone as if you just reflash it.