Hello,
BTW your kitty picture is soooo cute! I have two gray tigers, myself, and can appreciate the pose.
As far as the rotation goes-I would recommend trying it and seeing if you and your body can handle it. It depends how heavy you go, which mesocycle you're on, and how long you need to recover.
I'm currently doing the 3 month STS/LIS rotation from Jan. 2012 and the basic structure is:
Monday: upper body
Tuesday: lower body leg weights
Wednesday: upper body
Thursday: circuit
Friday: step/bike
Saturday: circuit
Sunday off
I'm really enjoying it and it's undulating, so I am never bored! I let myself other low impact workouts when I want for variety and feel really good on this schedule.
Beth