Re: Pro Tools questions.
Your mix sounds mono, here at the studio. this could be a problem. Are your drums coming from rewire? If so are they outputed via a mono or stereo aux? Can the individual sounds be panned within rewire and have you done so?
Same for the guitars, pan rythms to say, 9&3 o'clock and leads and bass guitars slightly off center (leave it for vox).
Sounds like the lead and rythm guitars were recorded using the same amp preset on your POD, not much definition, try different settings, don't be affraid to try something that sounds crappy when soloed. It might fit perfectly in your mix.
Keep in mind I'm listening to an MP3 encoded tune...
Also what sample and bit rate are you using? Use the highest rez possible.
EDIT: BTW, the guitar playing is fantastic.