Ok I wondered if the following would work with my K4NT...
Using Silver18 'noob' guide
http://www.mediafire.com/view/?d4mqgzr4cbrttzu
Could I start at page 8 - 'Place New Main partition and Copy it'? My Kindle is not actually bricked and I can get into diags mode easily using Windows in the normal way and presumably my kernal is fine. I'm just missing a few screen saver files.
From here I should just follow the instructions and copy over mmcblk0p1-k4-401 as this is correct for my Kindle (not the touch image file as in the guide).
Now just follow the steps through to page 11.
Alternatively how would I browse the file structure of my Kindle - I dont thin i have an 600x800 folder with any files in it so it wont update.
Thanks