Hai Davie653,
Try this link:
http://cinema.milkywaypictures.com/Rocket3.avi
It's a rough setup 4 a rocketlaunch, Codec is in DivX5, file size around 1.3 Meg.
Quality is not as great as I would like it to appear, but otherwise the file would have been 110Meg, maybe a bit 2 much 4 a simple example.
If U like it let me know and I'll send U the scenefile, so U can alter the setting yourself.
Hope U like it.
T.