It's not simple to change that completely, that is, the device-configurations are in qmc2.ini for good reasons and will stay there, but as I already said earlier I'm planning to add an import/export function for this, which would basically work the same way (the export could be automated whenever you change something, so you don't lose new entries).

A mind is like a parachute. It doesn't work unless it's open. [Frank Zappa]