Bitsetting for dvd+r DLwith 1.04 frimware for 3520a

Hi, when burning +r dl media can some tell me how to set to dvd-rom? Or do I need a firmware upgrade to do this? Thanks

It should automatically bitset to DVD-ROM with 1.04 firmware.

why not use LD’s 1.UA? better writting/overspeeding strategies than the original.