Galloup doesn't weiight flies because he fishes sinking line. http://www.youtube.com/watch?v=70j92LJjhNE
Fly tying Galloup's streamer: http://www.youtube.com/watch?v=TWq95R0vv24
Quick search and hours of information:http://www.youtube.com/results?search_query=streamer+fly&aq=f
http://www.youtube.com/results?search_query=streamer+fishing+techniques&a q=1&oq=streamer+fishing