Correct in general.
I don't have the experience with Windows (which one? I know that much) to explain how to make the USB network connection its default gateway and how to set up its dns through the Kindle.
Wait for a Win-Nijia to spot this thread.
(I don't do floors or windows)
Hmm... this one isn't too bad:
http://linux-ip.net/html/routing-intro.html