Sensurround was used for this? I never knew that. I did know - and indeed have seen - the cutdown film version of those opening episodes. There was also a cutdown film version of episodes The Living Legend and Fire in Space called Mission Galactica: The Cylon Attack and another called Conquest of the Earth which mashed up a few episodes from the follow up series Galactica 1980 (I forget which ones and can't be bothered to look that up). But quite honestly, it's better just to watch the TV episodes. Better still - far, far better, in fact - is the 2003 - 8 remake.
Sorry for the tangent.