I have a LaCie Rugged Thunderbolt SSD drive on which i have installed Windows 7 (of course this also works for Windows 8 or even Vista... The installation is fully independent from the internal Mac drives. Absolutely nothing is installed onto the internal drives.
For anyone else that is interested in my method... Read on
There are some requirements to get this working of course:
-Access to a Windows (7 or 8) computer.
-An external Thunderbolt drive which also has a USB connector (unless you have access to a Windows computer which has a Thunderbolt port. Or you could open up the external case take out the SSD and connect it to a Windows computer in any other way..)
-A Windows driver for the Thunderbolt drive.
(The LaCie Rugged SSD has a USB connector and comes with a Windows driver, which is the reason i chose this one.)
The installation method is done using official Microsoft tools.
Step by step guide (with pictures ):
https://docs.google.com/document/d/18TBlULjR_qr5WO_HaGrFO4QoKMnCPlObhFL0KahSQuQ/edit?usp=sharing
Would this work on a OWC Electra 6G SSD installed internally in a MBP using a data doubler? I have a late 2012 13" Macbook Pro i7. I use windows relatively frequently and would like to be able to have one internal HD for OSX and another for Windows so I won't have to always have an external HD with me.