Hi Atte,

Why not write a driver for JSynthLib? You can write drivers for library support only.
I've just checked the XP-30 manual,
http://www.johannes-emmerling.de/xp-30/downloads/Roland_XP-30_Manual.pdf
and it contains whole lists of names (at page +/-180).
If you copy them in a text editor and use the "replace" function, you can make a string array to put in your JSynthLib driver's constants file. Maybe you can start your driver from the jv-80 driver.
For more info ... see the wikis I started about
JSynthLib http://jsynthlib.wikispaces.com
and Roland SPD-11 http://spd-11.wikispaces.com

Rib Rdb also wrote a feature for JSynthLib to write drivers by describing the sysex in an .xml file.
But that's still in an experimental stage and very undocumented.

Regards,
Peter

PS: I can't really help you with the librarian part as my drivers for SPD-11 can't send sysex back and I don't have any clue why.
Maybe it will work when I install the next AVLinux that I just downloaded (my current install is messed up by too much experimenting). Maybe it's because I got something wrong in my driver.