Shame, im kinda stuck on DVD-R DL, since they are supported by my Panasonic DMR-EH55, +R DL is not.
In the users guide its reported it can copy from the HD to DVD-R DL, but it can not to +R DL disks.
Guess im forced to unpack the ISO's then to my harddrive and create a new set ISO+MDS that supports DVD-R DL.
Atleast this is possible with ImgBurn.