One benefit of flashing to DL13 is that it rectifies an audio problem (not sure if said problem was present in DL10, though)...also it allows for better media recognition.
As for upgrading the firmware...you can get DL13 here. As a general rule, I usually flash any drive in Safe Mode, and you MUST make sure the power isn't interrupted during the process. It should be just as easy as clicking the firmware .exe and running it (I have flashed my own 4167).
They also say to have your drive alone on an IDE cable (I think), but I've successfully flashed my two LGs, one as master on an IDE, the other as slave.
I'm a little unsure if it would help your problem, though you could try it and see.