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http://liggydee.cdfreaks.com/page/driveconv/

Change the internal drive identification

All NEC DVD burners store an internal drive identification in their Flash RAM. In order to cut license costs, some drives were sold without the ability to write to DVD-R, DVD-RW or DVD-R DL discs. Althought by means of hardware these drives are absolutely identical with there +R counterparts, it was impossible to burn these discs even when applying the "full version" firmware.
Some modified firmwares exist that allow crossflashed drives to burn the unsupported discs, but each time you want to flash a newer firmware again, this one needs to be patched too. It is possible however to modify the internal drive identification and trick the drive into accepting minus discs permanently. This feature was at least reported to work with NEC ND3100A drives.

If you want to upgrade (or maybe even downgrade) your drive, just download Liggy's NEC drive converter. Please note that changing this drive ID with the Drive Converter is only have the job. You still need to flash an appropriate firmware for the drive that corresponds to your new firmware ID.

Please not that it is IMPOSSIBLE to enable DVD-RAM support on 3550 and 3551 drives or Labelflash on 3550 or 4550 drives by using this drive converter.


譯典通機械式翻譯：
全部NEC DVD 燃燒器商店一內部行程鑑定在他們的Flash RAM 內。 為了削減許可證花費，一些運動被出售沒有能力寫給DVD-R，DVD-RW或者DVD-R DL 光碟。 透過這些運動那裡絕對與的硬體完全相同是+R 極相似的物的Althought， 即使當使用"全部的版本"固件的時候，燃燒這些光碟是不可能的。
一些修改固件存在允許crossflashed駕駛燃燒沒有支撐光碟， 但是每當你想要再次閃爍一個更新固件時，也被修補的這個需要。 但是修改內部的運動鑑定並且騙取運動永久減去光碟接受是可能的。 這個特徵被至少報告與合作NEC ND3100A開車。

如果你想要升級(或者或許甚至降低你的運動等級)，請下載Liggy的NEC 駕駛變換器。 請注意兌換與行程變換器一起的這行程身分證只有工作。 你仍然需要為符合你的新固件ID的運動閃爍一個合適的固件。

使並非那個滿意透過使用這台駕駛變換器在在3550或者4550 運動的3550 和3551 運動或者Labelflash 使DVD RAM 支持成為可能是不可能的。


這一段太長只PO連結
http://liggydee.cdfreaks.com/page/faq/

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