Anyone know where I can find an Instrument Definition for the Roland Boutique SE-02? 
Failing that, how can I make one? It has four banks of 128 sounds; the first three are ROM presets and the fourth is a user-defined RAM bank. 
There is no LCD screen on the synth that has patch names, so patch numbers by themselves would work fine.

Might be hard to find it online for that particular unit, but here are a few links that helped me a couple years ago to learn more about .ins files and how to build my own:
 
http://tweakheadz.com/how-to-build-a-cakewalk-ins-file/
 
http://www.raisedbar.co.uk/InsDef.htm
 
https://www.cakewalk.com/Support/Knowledge-Base/2007013272/Instrument-Definitions
 

Never mind, I managed to create one. The bank change works and I have all the CC parameters in. If anyone's interested in the file, PM me.

Cool, glad it worked out for you.  Did one of the links I posted help? :-)