Sorry didn't notice your post ...
been a little busy...
ya flashing from win7 is doable...
better is winxp or 'buntu (I suggest for those who are unfamiliar with linux since it installs and finds all necessary devices and stuffs auto. ...hence the best for the basics of what you need)
so unless you wish to do a virtual of winxp or linux (saying you have on your pc enough excess ram to really play with vm's that is. )
My best suggestion is this.
1- get a copy of the Nokia Internet Tablet Software Update Wizard
not an easy file to find...I'd give you a copy of mine...but I'm not going to post it openly..nokia proprietary stuff 'n stuff...which means private messaging you...which means in turn to do so...you have to post in proper forums (not the general forums) i think 10 times...then the spam filters figure you are ok ...and you are finally allowed to message fellow maemoers ) .
So the other option is using the one I know of on papy's

http://www.autopano.net/wiki-en/acti...d_on_Nokia_770

which should work fine. (if it doesn't for whatever reason...post enough times then pm me and I'll give you my copy)
This program is MEANT for windows...works fine on my winxp and win7 (just make sure you run compat. wiz. so it runs proper on your win7 is all).
Alot easier than the flasher... for those used to a visual windows program.

Next...
2- get the PROPER os2008 n810 diablo image... eh?


3- make sure your battery is full.
4- do exactly what it says on the wizard.
5- 1minute 30seconds later voila.
6-Tapioca!

Any probs just shout, whistle, vuvuzela, yodel ...etc
and I'll give you a hand.