Getting back from FW1.08 to 1.03?

Hello.

I have Pioneer DVR 106D. I recently flashed firmware to 1.08 (from 1.03).
Now, since I have some issues with recogniting some DVDs (burned with this machine itself) I want to get back to version 1.03! Is it possible?

You can go back by using DVRFlash 2.2.
But the problems come obviously from cheap quality media…