I haven't used the program myself, but if I may offer some "professional" advice?

I've been playing keyboard/piano since I was about 7 (nearly 13 years) and if you're looking for accurate MIDI representation of a guitar from a soundcard, you can forget it. Because of the way soundcards work, they simply don't have enough beef to accurately model a guitar sound, distorted, classical or anything else. Just like getting a truly authentic flute or trumpet sound, guitars can be stupidly difficult things to emulate properly unless you're willing to spend a great deal of money on good kit.

Software synths (as I have described on your other thread) come a little closer and providing you can be arsed to tweak all the parameters you can get some okay-ish sounds... but to be honest no MIDI compatible sounds can to the job 100% right