Adobe Illustrator i need to cut a picture put a Teeshirt?

I used a pre made shirt template and designed a disco ball. i blew it up and he did so his shirt hanging. i want to trim wahts not on the shirt, but can not understand. I just started using this program yesterday. please help. Heres the shirt i exploited that disco ball and hanging to the left side under the sleeve http://i6.photobucket.com/albums/y215/atreyu33/disco-tee-3.jpg target = "_blank"> function I use to find ways to use

Adobe Illustrator Help Site: http://www.adobeforums.com/webx/.ee6b328/

DIY – How to Make Custom T-Shirts – Design Template