You must download "the customiser": (15 day demo) A doubleclick will extract it to the present directory, then install it. Now start your instantcopy, do your setting until the customize media window with the slider. Do your settings and oversize your dvd. The OK button gets greyed out. Now start "the customizer" - continue - edit window click "enable" and "on" now be careful, don't click anywhere else than the greyed OK button within instantcopy. Then click "off" in the customiser and shut it down completely. Finally click ok in instantcopy. The prog calculates the dvd on the new size. So if you have set it to let's say 4.6 GB you hopefully will get 4.35 GB as your final result.