BTW I know the documentation is not very newbie-friendly (as I didn't expect non-developers to use it). Would be nice if someone who was successful wrote some resume or HOWTO if he found something hard on not documented. I think the easiest way now to reflash the initfs if you don't have linux with mkfs.jffs2 or xdelta command on desktop is to recreate and flash it directly from n770. But make sure you know how to reflash over USB cable it if something goes wrong. Also reboot device and do not run anything memory or cpu intensive (like 3 browser windows + mp3 playback) before trying to flash from device itself. Also you need rsync and osso-xterm or dropbear ssh server, I think it is easier to type it over ssh (all available from applications page)