TheDude,
It is entirely possible, through scripting, to direct FPSC to play an .avi after the main menu, and before level one (I'm assuming you mean while it's loading?)--
--Actually, re-reading your post, I believe that you either want it to play while loading, or before loading. In that case, scripting of the Loading screen, or Title Screen, is necessary. Of course, while I'm beginning to get the hang of scripting, I've heard that the video command is a concerning area, so I don't plan of giving it a shot.
Of course, if you mean
after loading, then, well, it's obvious. Place a Story Zone marker in the same place that the Player Start marker is
.
I thought I might add that I lived in Chicago for a while too, before I moved to Michigan.
Evil has a new name. Demo out now!