can't play DVD9 backup on my...

[dacornholio]

I got a copy of MGS2 substance backup that is on DVD9 and I can't get it working becuase i'm using DOA2 as my DVD bootdisc and i know that it is not possible to play a game that has a bigger TOC than my original bootdisc. My question is, is there a way around this so i can play DVD9 games, or i have to get another dvd bootdisc, or change the modchip. can someone help me out?

thank you!