I am the newbie in this stuff, so I appreciate if you can please help me.
I went to http://liggydee.cdfreaks.com/page/3550/ and I would like to flash my NEC-ND3550A to RPC1. There is so many firmwares so which one should I use? 
Once you flashed it to become RPC1, does that mean that you can make “backup copies” any region of DVDs using Nero? What about “playback”? Please advice.
I bought and installed the new NEC-ND3550A RW onto my Dell couple of months ago.
Thanks.
No reply? 
Just download the lates RPC1 latest version (in this case 1.G3) and install it you would be OK.
Welcome ramalec:
TCAS’s information will get you going on your first question (firmware version). In answer to your second question:
does that mean that you can make “backup copies” any region of DVDs using Nero?
Nero is simply one burning program. In fact, Nero is a suite containing many programs. While some call this bloatware, I like it & I use it.
You will find that those DVD’s which have copy protection will require additional software to allow for a backup. Nero will not make backups of copy protected software. Do a search on CDF and you will find there are a wealth of commercial as well as free programs.
1.G* firmwares will NOT work on retail drives.
Use the 1.06 or Liggy’s 1.06 with bitsetting.
Thanks for the clarification Liggy.
1.y6 is a great firmware to use, not only rpc1 but bitsetting and media speed enhancements. This is what I have used since March and it has done well for me. Remember if you use these none factory firmwares you will invalidate your warranty, personally I think it is worth it. Good luck.
Thank you very much, got the stuff works!