The way that I have done it two or three times is with fanoush's flasher (http://fanoush.wz.cz/maemo/). It's a script that you run on the tablet itself, then reboot and thats all, pretty simple.

The other way to do it is through a linux desktop, but as I dont have a linux box set up Ive never used it and dont know much (anything) about it.

These were the instructions provided to me by another helpful forum member the first time I did it. They give a brief explanation as to how to flash with either fanoush's flasher or a desktop.
http://www.internettablettalk.com/fo...5&postcount=10

Hope that helpes,
Borgel