In the drives firmware.
To be honest, I still don't think the drive can burn DL discs.
Where it says dual, it probably mean dual format. i.e. DVD+R and DVD-R.
Of course, if as I said above, it will recoginise a blank DL disc, maybe it can in fact burn them.
OK Thank you.
In the drives firmware, .... and in this case,.... no way !
Bad news for me and again thank you for your help.
!! Happy to use ImgBurn just enought for me !!