Downgraded my first nand ps3, now BR movies fail

So I did my first downgrade of CECHB last night. All went pretty well considering its my first ps3 nand downgrade.

At the time I didn't know about the whole blue ray movie stuff being stored in dev_flash3. So when I did the downgrade in the FSM this got overwritten. And now my blue ray drive doesn't match with whats in the dev_flash3....

I've done tons of reading and research on the matter. The easiest way is to find blue ray movies you've played and find the newest* one. This isn't an option; I couldn't tell you what movies I've rented and watched on this thing.

So....Is this possible?

Rewrite the original nand back to the ps3.
Play a very new blue ray movie so I for sure knows its updates the DLR.
Write my patched nands back.
Run the DRLGen on the new blue ray movie on my computer.
Run DRLCopy and hopefully get blue ray movie support back.

Will this work or is there a better way?

Thanks

EDIT: Got this working! I ended up using multiman to restore the movie playback.