Beanbagchair

My zeroB board has some options i don't understand - Millenium, PSP, and CROF (Or something like that - i'm at work - so i can't check it now.) Anyway - can anyone advise me as to what these mean? I checked the manual, I didn't notice them???

Also - from time to time I will notice the gun goes full auto. Not like ramping - I mean the trigger is pulled a few times - lets say 8/sec and suddenly it clicks over and literally - I'm not pulling the trigger and it will go full auto for about 10 seconds. I'm not holding the trigger down, it's not stuck down... The gun just jumps to as fast as my hopper (A cracked egg... hahah) will go - which is roughly 9-12 RPS.

Any advice?