Huh..I'm happy to watch this thread as well because I was just about to buy Guitar Rig 2. can I ask why you are using a multieffects pedal when you have Guitar Rig 2.?
I mean Guitar Rig 2 is the bees knees when it comes to guitar sound, so I would just record as clean and dry into the computer as I could and use guitar rig to then get the guitar sound I wanted as far as amp, guitar, mic placement on cab...
This being said, have you tried close mic'ing an actual amp or is this not an option?