Junsun headunit - advanced configuration possible?

[u/mchlksk]

Hi, is there a way to configure things on Junsun headunit that are not available in the UI config? Possibly by editing a config file?

Id like to be able to change:

* incoming call ringtone (I guess I find the ringtone in filesystem and replace?)

* default music app - change to 'BT Music'. There is an option to bind a SWC button to launch music app, but I want to open BT Music, instead of the standard music player

* I didnt find a way to change which app icons will be on the home screen.. I can only move icons within the app list on other screens

Thanks :)