3540a which firmware

I see the page to dl the new firmwares at but which one do i choose i want to be able to rip dvds faster and keep DVD-ROM to burn dual layer dvds.

could someone tell me which one on that page, and what does Org, slow fast, and i know RPC 1 means Region Lock this, so which one would i choose, i rip region 2 movies too for my folks when my aunts come from Poland.

1.f2 or 1.W9 looks promising.