I have a Liteon DVD burner and recently added the NEC 3040A with the 1W.5 firmware installed. I configured the NEC as the master on the secondary Ide channel, and the Liteon as slave on the same Ide channel.
Everything works properly and never have a problem burning or playback on either drive.
I just noticed that under properties in the device manager the NEC does not display the Region Code Tab, the LiteOn does. I never messed with the region code on either burner, no need to. I just don't understand why the tab is missing for the NEC, anybody have an idea?
One other question I have just for general knowledge is the message displayed regarding regions.
"Caution You can change the region a limited number of times. After changes remaining reaches zero, you cannot change the region even if you reinstall windows or move your DVD drive to a different computer."
I interpret this as XP is writing to the DVD and locking it in the last region selected. I didn't know XP had the ability to write to the drive.
Below are screenshots of the NEC and Liteon properties screen.