I visited with queer experimental film maker Lorin Murphy at his San Francisco studio, where he shared some of his techniques for making his montage films. 

You can see parts 1&2 of his Disaster Movie Trilogy here: 
http://www.youtube.com/watch?v=gmAxZa1L-Zk

His work has been screened at numerous festivals including Homo-a-go-go and Mondo-Homo, and he is curator of the monthly queer experimental film, formerly at big GAY warehouse, in SF. The 16mm film footage in this video is by Lorin. For more info, go to his website:http://www.cassowaryproductions.com