To disbale bios igr, u just place the disable_igr.whatever file included in the bios zip on your e:, as far as I understand. I use Ava (when I used evox I had evox igr disabled), and have no issues using igr....I am prone to the "evox crash upon bios igr" issue that has never been solved....so I changed to ava and all is sweet. Your milage may vary.