I have a pioneer DVR K-15 (fw1.11) and I read here that in order for a home unit to read dl burned disks you have to make sure your dl drive burns with this bit something. I searched for the guide but alas I couldnt find it partly because I dont remember the specific name used to discribe the format. Anyway the guide listed here had you go to a website and look for your drive and it said you must have this format or standard to do home dvd players format in dl mode. Im sure I dont have this function on my drive as at the time I checked the website, but what I was wondering is can a firmware upgrade add this function? Man I wish I could remember the terminology.
It's booktyping/bitsetting... Pioneer drives can do it if they are flashed with hacked "Buffalo 8.XX" firmware... Not sure if you can flash slim-type laptop drives, though... Check the forums at rpc1.org...
you may need to go to the makers website of the drive to find out about bitsetting / booktype for this drive
also if there isnt a firmware to make it do it with any app used for burning, you can get software to booktype but your drive must be able to booktype still...