I did p90x as well - loved it - great program - I did not follow the diet though but I am amazed at how many frickin pushups I can do now!!! LOVIN IT!!!
At the end of this month, I am going to use the P90X classic rotation, except I am going to sub out the cardio workouts with Cardio Coach workouts and Cathe Kickbox workouts and sub out the Legs and Back workout with Cathe Legs workout and tack on GS Back - -
I will post my plan towards the end of the month.....I love running in the summer, so I need to be able to do that - plus I couldn't get into the cardio workouts in P90x - they are ok, but just not that fun for me. I did LOVE Core Synergistics though