As today we have: Samples, Songs, Instruments.
How about default directory for vst, vsti, vst(i) presets. It shouldn't be to hard implement.
Agreed, and while we're on it, can they all be made to relative paths?
Closed, as this request already exists (somewhere)...
EDIT: http://forum.openmpt.org/index.php?topic=1684.0
It has even been started by you. :P