i know there's guides out there for ps2mame. but it still seems complicated to me. and one thing seemed unclear between these guides. some stated that a mod chip was needed and some made no mention of a mod chip. could someone lay it down for me one more time. how do i play killer instinct on my ps2. i already have mame and KI on my computer. (dont worry i have an original KI cabinet in my garage). so lets say i have a rom or 2 for mame and some chds. i wanna play them on my ps2... do i need a mod chip? what do i do?