Sony U10 to Dru 500



I have had my Sony U10A DVD Writer over a year now.

In would like to flash its firmware to a Dru 500 then upgrade to the latest version for the 500.

I can probably get the latest version of the 500s firmware from the Sony Site, but don’t where to get the flash software that will change it from a U10A to a dru 500.

Any help would be appreciated

Or am I wasting my time?