I`ve discovered a great program for making custom .avi files. That program actually captures your screen and makes .avi files. So, you can create a scenario and make those triggers, so the the computer does it all. You could create something like a movie (a scenario in which user player takes no part, the whole scenario is played by computer, using triggers), then run that scenario, run the program, and - tada! You have a perfect intro for your campaign. But, (there`s allways one BUT) the program requires a very fast computer!!! If you would like to save the area of 800x600 with 15 fps and good compression (picture quality), you would need something like PIII 1,5GHz, 256 MB Ram... You get the picture. But if you choose reasonable capture screen resolution and fps, you could create very good movies. If you`re interested, post a reply, and I`ll post the adress from which you can download the program.
P.S. If you have something less then PII 433 MHz and at least 64 MB of RAM, don`t download the program, you`ll waste your time...