I need an exercise program that is more intense than Power90 but not as extreme as Insanity or P90X?

I borrowed the Power 90 program from a friend of mine and did it for about a week...but it was somewhat easy for me and I wasn't really into it. So i gave it back (politely lol)...I got Insanity later on in the week and it was pretty intense! It's been 3 days (incl. Fit Test) I've only been able to get through about half a circuit before I'm literally almost falling over lol, and just today I got through the warm up for the 1st time without stopping. I'm 16 years old, 5'9, 202 lbs... people say I look around 170 though :) If anyone could help me out that would be great...I wouldn't be mad if there's nothing out there like what I'm looking for, I'll keep doing Insanity if I gotsta...I'll just keep going as far as I can :)