The way i see it, if a guitarist is going to embrace MIDI, they are going to have to alter their playing to a certain degree to accommodate MIDI and the way it interprets the data it's getting. There are certainly ways to do this technologically, but the ultimate solution also involves adapting ones chops to the medium. Keyboardists do this all the time. A B3 is a different animal from a grand piano which is different from a clav and different from a crappy upright....you get the picture. You can select on the guitar mono mode which is a solo setting where all strings send on the same channel, good for playing those sax solos, or each string on it's own channel, which is pretty cool for polytimbral playing. Again, in order to make it really work, you'll have to play very cleanly and precisely to get anything close to keyboard like parts without a bunch of extra unwanted stuff creeping in.
I think if you just want pads and simple parts, it might be easier and more satisfying in the long run to simply press forward with getting better on the keyboards and just solo on your main axe. Besides, when was the last time you heard a keyboard solo in pop music?

