Many thanks to those helping me getting the DTV HR20 upgrade working. It worked fine in my OFA 9910. So much so I wanted to install it in my OFA 6012B (w/extender).
I keep getting the message below. To troubleshoot I tried downloading and uploading in to the same remote. I even got the same message trying upload the exact same struff that successfully downloaded.
This is just a warning. You will get it anytime you upload an extender for the first time, as the signature of the extended remote is different than the unextended one.