For the "Genie 1s" (to use the expression), your specific account has to be flagged to receive a new NR automatically as DIRECTV rolls them out progressively as a safety measure to allow for a bailout from the update quickly with minimal service disruption to customers in case the new firmware cause an unforseen major technical glitch.That's what I meant by resetting. If the new software is in the stream, you don't need the 0 2 4 6 8 code IIRC.
To receive a new NR manually before your receiver's scheduled time, you must wait until it begins spooling out in the stream typically around 6:00-9:00 AM EST. And then do the usuall receiver reset followed by the "0-2-4-6-8" key presses at the first bootup screen routine to force the download.
Using the FW Watcher is a big aid in this to let you know when the new NR begins spooling out in the stream. But it's down (again) right now.
As for the Genie 2, I guess a new NR will come whenever your account is scheduled to get it, usually pushed over the internet.