Yes, iHas is basicly a requirement for all XGD3-Games, imo.
Though, with all these recent events, I'm not shure if it's even clever to stick with discs anymore. The XKey-Team had the problem solved before c4eva did (which simply stole their method), and LT 3.0 is still nowhere in sight. Not to mention that you don't need to (re)burn games with an ODE. I'm still waiting, but I think I won't go back to CFW. That's only my opinion, though, decide for yourself.