You have edited the template for your amp to achieve this right? How do I go about changing this for the web orbiter itself, so that it works for all MDs (I don't have any amps)? Am I supposed to be looking in /var/www/LinuxMCE-admin/weborbiter?
This can only be changed in DeviceTemplates for individual AV devices. There is no possible change to weborbiter to implement this. Once implemented in the DeviceTemplate it does not matter what orbiter you use they will all function the same... for that device. I don't know if there is a way to implement this functionality if you are not using an external AV device (like an amp), but orbiter would still not be the correct location to do it.