It's been a while since I burn't an XDG3 lol, i can't even remember how! haha, do I need to change any settings using verbs and the iHas drive?
not really mate tbh, just set the layer break to calculate optimal and you should be good to go,its what i use for mine and they work fine lol
http://www.xpgamesaves.com/topic/24370-how-to-burn-your-xgd3-backup-imgburn-new-version-no-errors/ There you go mate