looks like you only want to remove certain limitations, instead of total debranding, which you may not be able to reverse should you wish to for warranty purpose.
For instance you can enable MP3 ringtone by changing the following line in customize.xml
<enable-ringtoneplayer-mp3>true</enable-ringtoneplayer-mp3>
suppress camera sound when in silent mode:
<suppress-camera-sound>true</suppress-camera-sound>
Or load a different camera shutter sound file, without changing anything else.