If I could make a suggestion...
Play with the FPS Creator program, get to know the functions of entities, segments, etc. Look at the scriptbank folder and familiarize yourself with scripts. These script files control such things as enemies coming into a room, etc. This way, you will understand the full extent you can go with FPSC and have a better understanding to accomplish your goal.
As far as talking, there are a few scripts out that have demonstrated talking. If you check the Official Community Guide to FPSC, there was one listed in there.
If you are planning to take it to a different level, some have used animation software to create a scene, etc. You would have to do some research on that.
Cheers
Mike
