Hi Shannon
I'm just finishing up my first ever Cathe's rotation (August, '07--got a late start and I take extra rest days--tee hee), but I'm loving it!  It's really making a difference in my legs, butt and overall leanness (sp?). Next I'm going to try FitnessFreak's one body part per day rotation.  I can't do high impact stuff either so I substitute walking or kickboxing.  If you haven't checked out the rotations for Cathe and  FitnessFreak, you might give those a try. 
Jonahnah
Chocolate IS the answer, regardless of the question.