Thanks a lot for taking the time and sharing this. I have followed this step by step and was able to move windows 7 64-bit partition onto external buffalo ministation thunderbolt ssd. So far I have only tested it with my macbook pro 13'' retina, but i have all reasons to believe it will work with any other thunderbolt mac. Just waiting for my new imac to arrive and will comment if it works with it.
Experience of running windows from external thunderbolt ssd is great so far. I only use windows for some games though, so not sure if it's good for everyone.
The only downside of this method (which isn't really a concern for me now that it all works) is that I had to buy Winclose from the official website for 20 bucks. I only used the latest version from developer's website and have no clue if other (older or cr----d) versions work for this solution.
Well the alternative was to hunt down version 3.5 of WinClone, which was free. Ironically after you load version 3.5, it will check for updates and download 3.7, which is the latest version. And it's still free.