as far as I know...you can only fit upto like 10-20 extra MB onto a CD by 'overburning'... Now before you do any overburning I would suggest you find out if your burner will handle overburning...by asking around...and then there is still a chance that you can screw up your burner... And it isnt worth the chance (in my opinion) of hurting your dvd/rw by trying to fit as much as humanly possible...