This is the exact same system i use and it rocks (designed by our own Jason Klass!) :
http://www.youtube.com/watch?v=wSYWoplv_Uo

Cheap, light and effective...what more could you want?
BF <img src="/forums/images/graemlins/cool.gif" alt="" />
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Hammockers aren't stuck up, they're just above it all.