Could you modify this to do direct transfer of vessel to vessel on the ground not docked?
In principle, it is so already. It just uses one fixed endpoint, the "base"-vessel.
How do you think it should work?
Detect nearby vessels (docking port within given range) and link them together? Calculating eucledean metrics for all vessels is O(n²) for simple algorithms. You can bring it down to O(1), but that would need a rather complex mapping algorithm. I'm not willed to implement that.
The better option would be to explicitly create "virtual docking-tunnels", i.e. specifying the vessel to be linked to in the MFD.
ATM, I'm more into OMP again, so any development from my side on this will have to wait until after the next Orbiter release (at which point I'd have to recompile all my addons, anyway).
OTOH, the source-code is available via
http://bitbucket.org/face/ummufb , so everyone who wants to contribute is welcome!
regards,
Face