Same problem here. I've flashed "Liggy's AD-7173S Bitsetting Firmware 1.03" in my Optiarc DVD RW AD-7173S.
Bit changing the booktype with ImgBurn it doesn't work on Philips DVD+R.
tab NEC
Current Setting for "Drive (For DVD+R media) says :
DVD-ROM (changes Available :498)
This setting is NOT active.
How can i make this setting Active ?