The guitars were double tracked with an Axe-Fx. If you're savy with the Axe-Fx I used the Solo 99 Ld head with the German cab and 808 Mod overdrive pedal.
I line out to a cheap Presonus USB Audiobox interface and that's it. I don't do any post-processing of any kind with the guitars and I keep my Axe-Fx setup really simple, so you can really hear what the pickup has to offer.