Advice on Workout Scheduling?

Alright, so as of right now I do two workouts a day on average. I do the 30 Day Shred in the mornings, and then I do a power walk/partial jog (increasing the jogging portion, decreasing walking as I go along) in the evenings that takes around 40-45 minutes.

Today my aunt brought over her Wii with the Zumba game for me to try out because I told her that I wanted to try it but I can't afford a class nor the gas to get to a class (I live 20 miles out of "town").

Now I'm not sure how I should juggle the three workouts. I know I want to do my walk/jog every day because I do it with my mom and we really enjoy it. So I thought about alternating Zumba and the 30 Day Shred every other day, but then I'm concerned that I may not be getting the full benefits of the 30 Day Shred if I'm not doing it every day (minus rest days)? I also feel like 3 workouts a day would be overkill as I already struggle to eat back all my calories from exercise as it is.

So, I was wondering what other people suggested I do. Should I alternate Zumba and 30 Day Shred, and do you think I would still get the full benefits/results of the 30DS? Should I just do Zumba every couple days instead of the 30DS? Only on rest days? I was just curious what other people would do if it were them.

Thanks in advance for advice and suggestions!