Doesn't the stock Mach 460 have a AUX button? If so, then you can get buy any 1/8 inch audio jack that can connect to the Mach460; then use the AUX button? Me and my friend did it on his mustang v6 Mach 460, a long time ago; and it had a AUX. AUX + buying 1/8" auxiliary cable= enable you to place any MP3 device you want? Correct me if I'm wrong