check any of the chopper bike forums or schwinn forums. they make a good base for custom ideas so a lot of people have used them. this was the first stretch i'd seen, and it's pretty straitforward too
http://www.schwinnbike.com/usa/eng/f...hlight=stretch
edit 'cause i just looked at the link and the first pics are gone, but keep going and one of the later posts has some.