Crossflashing OptiArc AD-5540A as AD-7540A



I just got an AD-5540 with Dell 102C firmware (it was a warranty replacement for the original ND-6500A). I use DVD-RAM for transporting movies within the family (Panasonic stand-alone DVD recorders) and would really like to be able to play and record them on my laptop.

The OptiArc AD-7540A seems to be the identical drive with DVD-RAM read/write capabilities. Is the hardware compatible? Will crossflashing the 5540 with 7540 firmware enable DVD-RAM?

Not that this would make any difference until I made changes… I am using a Roxio Suite on XP SP2, not Nero. Any problems or missing features by keeping it?