What could possibly take six studio savvy, experienced musicians over two years of rehearsal to accomplish? How about creating a faithful, live performance reproduction of one of America's most sophisticated and durable musical icons? That was the challenge for this recent entry into the ever-growing world of tribute bands. They call themselves Show Biz Kids. It's as much a sardonic nod to their 150 collective years of playing experience as it is to the SD song of the same name. Why would six pro musicians put so much time into someone else's material? Working the Steely Dan book alleviates a bunch of typical band quandaries, states Doug Kupper, guitar and vocalist of the group. Most groups agonize over song selection, but with the Dan there are 9 original albums to draw from, 5 solo projects, as well as live concert recordings. You could mine that trove for years. There's also the advantage of the song's complexity, instrumentally and vocally, that will keep even the best players challenged. In addition to strong jazz and rock instrumental abilities, this group has the benefit of five capable singers to handle the intricate harmonies that are an S.D. trademark.