Been lurking here for weeks since I got my N800....

I have no idea how to install this "update". I've already used the flasher tool to put my N800 into full-on root mode (?) to get past the dreaded constant reboot error and have recently reflashed it with the new image that came out a few days ago. Solid as a rock so far.
But two things I want are:
SDHC capability ( I think I have this one figured out...it's just a kernel reflash and Kalle has the exact command-line procedure for it)

and this 3.1 update.

So what's the exact command(s) to reflash the N800 with 3.1? I'm not a programmer so I get bogged down in the readme. To me it just sounds like some sort of update to the SDK to get it in sync with the recent image released a few days ago.