Tool To Transfer Midi Mappings Across Songs

I have this idea for a tool that would be difficult or even impossible to achieve with XRNS-PHP, so I’m looking into the possibilites that JRenoiseTools might offer…
Basically, the idea revolves around exchanging MIDI mappings between songs. As a result of making a complex plugin with exhaustive MIDI controller mapping features (osc_repeater), I need a way to copy these settings from one song to another, instead of mapping it over and over again.

I had something like this in mind:

Now, I don’t now anything about the Java GUI libraries, but it would be a lot easier to work with, if we had this kind of hybrid database / tree-structure control.

Wow, I didn’t know that DSP chains contained mapping information * Brilliant stuff *
Now, you mention that any existing devices will be overwritten. I can live with that!

The ultimative solution would be, if any devices/plugins were able to store their mappings ‘internally’, just like how presets currently work. But I guess that belongs to the ideas & suggestions thread.