Upgrading Asus 4816x to 4824x or 5224x

Hi all!
I have a CDRW Asus 4816x. On your site I found different firmwares for Asus drives. So, can you answer me: is it possible to update my CDRW up to 4824x or even to 5224x?
Who had any expierence upgrading drives like mine?

So, any ideas?

I don’t think that it is.

And one more question: where I can get firmware for 4824A in .bin format? For 4816A I’ll do it myself, and what about 4824A?