First of all thanks again for all your hard work getting these updates to all of us. Why Panasonic doesn't make them available is the big mystery.
Anyway I downloaded the new file in the Nero .nrg format and clicked on the icon. Nero (v126.96.36.199) opened and I put a blank CDR in my drive. But the only speed option available was 40x. Nothing slower, nothing faster, just 40x.
So I went back and downloaded the .iso (thank you Road Runner) and tried it in Nero. Same thing...only 40x is available. I took a chance and burned the disc and it came out fine.
Loaded it in my RP-91 and it came up that my player did not need the update. I knew that already because I updated it with the previous disc you provided. Just wanted to see if the disc I burned at 40x was OK.
So I ejected the disc but accidentally closed the tray and the disc loaded again. This time though it went through the usual reading process, but told me the update was completed. I checked the firmware and it still says 262 as before.
I went back and re-entered my settings and everything is fine. Also note that the macrovision I had turned off with SD2 stayed off, unlike the last time I updated from v250 to v262. Guess it doesn't touch the macrovision if the player isn't updated, just the player settings are reset back to default.
Anyway that's my experience. Thanks again and keep us posted about any new updates!