What physical fitness routine should I go through to prepare for AFJROTC SLS?

I am currently a c/tsgt, and I just found out that I got selected to go through a bootcamp like SLS, at nellie air force base. This SLS, is being held in four weeks from Sunday, may 30'th, 2010. I need to know of a workout routine to help me get ready, please helpWhat physical fitness routine should I go through to prepare for AFJROTC SLS?Insanity.... or P90X but insanity is more hardcore