Haha, yeah in the version of the esb script I used, the snowspeeders are 'rouge squadron'...
Dunno if it's an error in the actual script or just this one.
Also I removed the CHARACTER: bits (and INTERIOR/EXTERIOR) when they have lines, like LUKE:, HAN: etc., so the names are just from the descriptions or when that name is mentioned in dialogue.
Edit: Added prequel clouds in the first post.