Firmware information
  CD−R CD−RW DVD−R DVD−RW DVD+R DVD+RW DVD+R DL DVD−R DL DVD−RAM
Strategies 1.02 B.05 1.04 B.05 1.06 B.11 1.03 1.04 1.16
Bitsetting   Yes Yes Yes  
Date1 (*) 2006-01-25
Date2 (*) 2006-01-17

(*) Date 1 seems to be related to the strategy version while date 2 seems to be related to the main firmware code

The following firmwares are included:

Dee's 1-Z1 modified firmware for the ND-4571A

This firmware supports full bitsetting.
Original and RPC1 versions available.

This firmware also includes tweaks to improve burn quality on selected DVD R media.