genisoimage doesn't create proper split point for dual layer disks

[peteritism]

A couple of forums mentioned that it might be possible to do this with genisoimage with a workaround. mkisofs may be able to do it. Alternatively, it may be possible to run the ISO through a post processor to create the break.

Useful imgburn error info:

Optimal L1 Data Zone Start LBA: NOne Found! (VTS_01)
This image has not been mastered correctly for burning onto a double layer (OTP Track Path) disc.
None of the cells meet the 'DVD-Video specification' criteria for a potential layer break positition.