Load random movies into target mc

I am in the process of creating a VS Card game in Flash. It is basically a game where you can choose either one card or another, each randomly pulled from one of the eight different sets. The first card (or swf) can be pulled from any of the 8 sets (out of a total of 12 cards in each set))…and will load into a targetMC, and the second must be pulled randomly from any of the 8 sets except from the folder where the first card was chosen and load onto the second targetMC.

any help would be greatly appreciated!