Getting realism in a programed guitar solo

I need suggestions on how to making a programed guitar solo sound more like it was played. The virtual instrument is Electri6ity, I've got an acceptable sound from Guitar Rig 4 but the problem is the performance is too smooth, it sounds synthy... If Groove Quantize is the way to go, I need suggested settings because I've never used that feature before. The passage is quite fast in places (6 notes to a beat at 125 bpm) I played it on the album and I used to play it live all the time but that was 30 years ago. Thanks - rev