Whilst this is for the PW rather than the PW2 I'm hoping that it's along the same lines.
http://www.youtube.com/watch?v=sT902XX03Nw
I won't be pulling it apart until I have everything I need in place, but as soon as I do I'll try and write a step by step guide, probably with pictures.
I've got insurance on my Kindle, just in case anything goes wrong.
Hmm, looks like I may need a friend to be present as the cables for the usb-serial adaptor are colour coded and I'm colourblind.