Hah, nothing. I just have to figure out how to do it properly so they don't suck, never made an IR before!
I did that one. It can be found in this thread: http://forum.fractalaudio.com/axe-fx-ii-user-cabs-irs/93344-freebie-ir-my-zilla-fatboy-2x12.html
Sorry for reviving this
I'm just wondering if anyone has any new free Zilla IR's to share