http://www.powersportparts.net/ProductDetails.asp?ProductCode=15-18 (http://www.powersportparts.net/ProductDetails.asp?ProductCode=15-18)
Buy some of this at your local auto parts store and spray it on the backs of the pads prior to installation:
(http://i1221.photobucket.com/albums/dd470/Motobrick/gen_maint/discbrakequiet.jpg)
Easy to do. A nail set is a good tool for getting the pins out.