Basically took the direct (clean) guitar recording and sent it to 4 different amp sim tracks, panned hard L/R, Center and i think the other one was centered as well.
Used LeGion from here: [Only registered and activated users can see links. Click here to register]
as well as wagner sharp MkII and a couple of other lepou amp sims but i cant recall which ones off the top of my head. Also used his impulse loader for some and Kefir which is another freeware impulse loader. Basically just a blend of those sounds with some hefty eq and a tube screamer emulation vst in front of a couple of the amp sims. The impulses are various cab impulses (bogner, mesa, orange etc) from the forum below...
Nothing out of the ordinary really, if you want more info on that sort of thing, i learned pretty much everything i know about amps sims from here:
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