I tried this qemu method, and it did not work. I had this same task but never was able to solve it, qemu or otherwise. The problem with qemu was that it left me a partition that was not recognized as a Windows partition by the Bootcamp loader on power up. Something was missing in some partition table by just doing a raw byte copy. So, you can try the qemu method, but it didn't solve anything for me.
I ended up using Windows backup to restore my data and apps.