That's SO wreaking havoc on me. I'm not even an English major, and my eyes hurt after seeing that!
So basically you got a few custom models designed with Quake in mind and developed with software from somebody else that apparently knows you, and you wanna convert them to the format that FPS Creator takes to be able to use them in your own game.
First, you probably need to know the format your characters are in right now. From there, just search the boards until you get your answer. If you STILL don't find what you're looking for, then I'm sure someone would be willing to help you out, or at least point you in the right direction.
Off hand, though, I'm willing to bet you could probably use Milkshape to at least convert the models into the format needed for the program.