I am trying to limit the write speed on my Pioneer 207D so that it will burn Verbatim 25GB BD-R discs at Verbatim's stated 6x speed. Currently, ImgBurn burns these discs at the max for the 207D ~10x. I have tried playing with the Tools>Automatic Write Speed>Disk Id:" but have not had any success since I don't know what it wants for a "Disk ID", etc. I know this question has been asked many times...but be gentle...can someone point me to the solution. I am using ImgBurn to handle the Blu-Ray burning within DVDFab so I would like to have the parameters preset in ImgBurn. Thanks in advance.