2510 stock firmware

Does any one know if the stock firmware fior the Nec 2510 is capable of bitsetting or do I have to use Herries firmware. If I do have to use new firmware then what one is the best for this drive to keep all the functions like Dual layer and add all the rest.

Thanks in advance

Official “NEC” firmwares do not support bitsetting.
HP firmwares (written by NEC R&D for rebadged NEC drives) do support bitsetting.
Please see the Firmware sticky in the NEC Forum.