this DVD helped me out immensely... http://www.weldingvideos.com/gmaw.html Youtube vids helped a lot too.
[ame="http://www.youtube.com/watch?v=ognlcIZ9U5Y"]YouTube - Welding Techniques [S4 Ep.5-3][/ame]
[ame="http://www.youtube.com/watch?v=BsDxqb2p5OM&feature=related"]YouTube - Mig Welding Automotive Sheet metal from How to ASAP[/ame]