I'd also suggest starting out with a selfbow instead of a glass laminate bow. I've made quite a few out of plain red oak boards from Lowes and Home Depot. Here are a couple of sites with good 'how to' instructions.

http://groups.msn.com/ferretsarcherywebpage/buildingbowsfromboards.msnw
http://mysite.verizon.net/georgeandjoni/archer.html