Hmmm...
Body Max and Body Max 2 are, roughly, a 8 min warm up, 25 min of steady state step, 20 min. of step/leg circuits, 20 min of upper body work, followed by 8 min of abs, and then a well-deserved stretch.
Based on the DVDs you have, you could do the LIS step segment, then the Body Max 2 circuit segment from Cardio Fusion. After each blast, pause the player and do a leg movement (i.e.: 32 squats, 32 plie squats, 16 static lunges on each leg, 16 alternating lunges, etc). You could also do 4 intervals from Imax 3, again, pausing the tape after each interval to do a leg movement. After the leg circuits, do 20 min. of upper body work, then an ab segment. Lots of disc changing, I know, but you should feel pretty darn proud once it's all said and done.