Hello. I'm a new poster here. I just got a Nexxtech-branded DRW-6S160P and was disapointed by it's performance with my DVD media (CMC MAG M01 and CMC MAG E01, which make up the vast majority of what I find around my neiborhood). I searched google for firmware, after finding nothing from Nexxtech, and found that some people here suspected that the DRW-6S160P was the same drive as the LiteOn SHW-160P6S.
Since I'd already decided to return the drive, I went ahead and force-fed it the latest SHW-160P6S firmware (version PS0B). I had to use FlashFix ( http://digi.rpc1.org/flashfix.htm ) and ignored FlashFix's error about the filesize being out of the specified range (I assumed that was 'cause it was expecting version PS0A and hadn't been updated for PS0B).
It appears to have worked and the result so far is a night-and-day difference in writing quality on my media! The E01 went from pathetic to pristine and the M01 went from inconsistent to consistantly decent, so it seems.