Yes, it probably WAS too difficult for you to understand. Probably too difficult for ANYONE to understand, unless you were a computer scientist working for Roland! They are better now, they're discovered the value of a few examples of real world use of SYSEX, although sometimes they aren't perfect.
If you have the manual for your whatsit, this OUGHT to have the midi map, so if you have a spare weekend you might try to make sense of it. I have enough of my own whatsits, so I've not bothered with your Fender thingie, which may well be even more complicated than the midi map. Otherwise I'll have to try and find the midi manual on the web, and try and make sense of it via html,
But hopefully, someone here might have such a device, with the manual, and be able to quote you the details
But, being a nosey blighter, I just might check the web abyway.
Geoff