PING - mkisofs - DVD Dual Layer ISOs.

[Zoom7000]

I thought I might get some more luck in this forum. In reference to this thread, I've sucessfully created numerous backups using PING. However, I am now trying to create my first "Larger than 4.7Gb" backup. I've managed to create the ISO, but when trying to burn it using 3 different burning programs and at least 3 different types of DVD DL+R disks, I keep getting LBA errors and the image won't burn. I've read around and it seems mkisofs doesn't like images bigger than 4.7Gb. Is there anyway I can burn the images to DVD Dual Layer without having to multispan?

I'm posting here because as far as I'm aware mkisofs is unix based. I think :p

I'm using the Windows version of mkisofs, is there any way to get it to create DL images?