Great question, Diver782. I too am thinking of doing STS again - all 36 disks in order for a 3 month rotation and would need to chose workouts for the other days of the week I'm not doing STS. Cathe has not published (as far as I know) a rotation that specifically does this with recent DVDs - the last time she did so was in Jan. 2010, I believe. But I think we could easily design our own rotations using the same sure-fire format Cathe has advocated. Cathe scheduled STS on Mon., Wed. and Fri. and cardio on Tues., Thurs. and Sat. with Sunday set aside for walks, yoga, etc. For the 3 cardio days per week she scheduled in 1 high impact hiit workout, 1 low impact hiit workout and 1 steady state cardio. With the series that you mentioned, I would select from the following workouts for your Tues., Thurs. and Sat. workouts:
Low Impact Hiit days:
Ripped with Hiit - Low Impact Hiit
XTrain - All Out Low Impact Hiit
Steady State days:
ICE - Rock'm Sock'm Kickbox
XTrain - Hardstrikes
High Impact Hiit days:
Strong and Sweaty - Cardio Slam
XTrain - Tabatacise
Ripped with Hiit - Plyo Hiit
So, in other words, you don't need or want to do any other weight training for the 3 months except your STS workouts. Just plan your cardio workouts to do on the days in between STS, and ensure you mix up the cardio. I am planning to do low impact hiit every Tues., steady state every Thursday and high impact hiit every Sat. I am also planning on tagging on a core/ab training bonus after each of the hiit workouts (Tuesdays and Saturdays in my case). All 4 series you mentioned have bonus ab routines to rotate through, doing 2 of these workouts per week.
But, if you want a one month STS sampler mixed with a newer series, there is a Ripped with Hiit rotation on page 13 of the User Guide, as Firelight mentioned:
https://cathe.com/Ripped-with-HiiT-Users-Guide.pdf
Good luck and hope you have fun. STS is sure to bring you great results!