This is the place to get it.
Kindle for PC - CNET Download.com
download.cnet.com/Kindle-for-PC/3000-20412_4-75185974.html - 144k - Similar pages
You cannot get this from Amazon unless you are within their authorised zones. This means if you are living in Asia or SE Asia (Malaysia, Indonesia, Singapore) you cannot get this from the Amazon site.
I installed this from the cnet site it worked. Came with three free books.