This post http://forums.androidcentral.com/motorola-droid-x/99356-how-change-default-music-app.html is a good reference but I didn't see a similar way to do this for the S3 with ICS stock. Am I missing something thats right in front of me? I want to change the default music player to another player, and ideally have that show up in the Notification shade pulldown as the default player after inserting the headset jack. I checked around in settings and didn't see any obvious options.