HI KALI,
I AM A NEW CATHE FAN AND ALSO A FIRM FAN. YOU CAN GET FIRM VIDEOS FROM AMAZON.COM,THESE ARE GOOD, TO WORK UP TO USING CATHE, AS HER WORKOUTS ARE TOUGH.
AMAZON SELLS THE OLD FIRM VOLUME 1 AND ALSO SOME OF THE LATER FIRM VOLUMES. THOUGH I PERSONALLY ENJOY VOLUME 1, THE MOVES ON IT ARE...