Hi Dan,
Cathe has a workout called Step, Jump & Pump (SJP), which is a 70-ish minute circuit workout. It has stepping, hi/lo aerobics, and total body weight work. The dvd also has a zillion premixes on it that allow you to do shorter, customized workouts. The one you might like is the one that has the step section (22 mins) followed by (or alternatively, circuited with) the weight work.
Also, she has a dvd called TimeSaver, which has 5 shorter workouts on it. Each workout consists of about 20-25 mins of cardio, followed by weight work.
You can actually choose to purchase any of Cathe's cardios, regardless of length, because they are always broken down into segments. Many people will just choose to do one or two segments of any given workout, depending on their preferences. No need to do an entire one hour cardio, if you only want to do one 15 minute combo!
I highly recommend the dvd that contains Step, Jump & Pump. It has another cardio workout on it, Step Blast, and the abundance of premixes on this dvd make it extremely versatile for all workout levels and preferences.
Cheers,
Sandra