Flash interactive customization form?

http://www.cyberteks.net/flash/customizer/tps/customizer.asp

http://shop.nhl.com/product/index.jsp?productId=3797003&cp=4055930&clickid=body_bestsell_img

I’m interested in having people be able to customize hockey shirts. I saw these two sites listed above. I’m wondering how and if anyone knows how to go about something like this. If there is some sort of template that I could use as a basis for something interactive such as this.
any help would be much appreciated!
Thanks