Although it's not the Cab Pack that gets used much these days I always love going back to the pack that started it all for me Cab Pack 7: CK's USA Traditional 4x12 UltraRes. I used the CK CHAOTIC ARRANGEMENTS IR for this song and of course Cab Pack 11 for bass as I always do.
For those who don't know there's been a conversion from UltraRes to UltraRes 2.0 in which I re-created some Petrucci-esque Preset-Cab Bundles that can be heard in this clip:
I strongly advice all you Cab Pack 7 lovers out there to visit the pack again and the UltraRes 2.0 Preset-Cab Bundles.