Thanks so much for pointing me in the correct direction. I managed to fix the audio issue as well as an issue whereby my steering wheel button to change audio source wasn't working. I've updated my previous post on this thread to detail what to do.
What I don't get on the screen anymore is the indicator if I open a car door, or the "Checking" progress messages if I press the "Check" button below the speedometer. Any ideas on these? Surely it's another setting or two that enables these. Settings which aren't covered by that script.
EDIT: I fixed the above as well (having the screen show me when car doors are open, pop-up messages, etc. This is more complicated. You need to download the original
MiraScripts (this is where the
Deactivation of Activation Code files come from) for the RT6. You run this on a USB stick and select an option that saves your RT6's entire configuration on to it. This USB stick is then plugged into a computer with the program
DatExplorer that allows you to edit specific RT6 settings one by one. This is where you find and enable the pop-up messages on the RT6. You can customise a lot more here too. Once you save changes, you plug in the USB stick back into the car and instead of saving the configuration, you replace it with your modified one. A reboot of the RT6 and it's done. The
RT6 MiraScripts and
DatExplorer are all available through here:
http://mira308sw.altervista.org/en/
If anyone needs any help doing this, I'm happy to guide you.