Make generators on a belt just move like normal events do. The features, such as more events on one tile, will get their own events. Also, things included in crates (are that those SCE's?) must work like normal events too, if you want a laser for the GF levels, you can put in an automated shooter, set to the laser (thats gun0 for the event, I think, powerup parameter simply does nothing) and wait time in secs=0, so it only shoots once. This way, you dont need MCE's and it is better when you can put generators on belts, without the parameters being ripped out of it.