Bootcamp on USB HDD?

[yusukeaoki]

Hi guys.

I have 128GB SSD installed on my MBP so installing bootcamp there is not an option.
However, I have a 500GB HDD with OS X+ bootcamp installed.
I was wondering if there is a way to boot Bootcamp via USB?

I saw couple threads posting that it is impossible but I want to be sure.
Running VMware is not an option as well since I need to run the full potential of graphics card.

Thanks in advance.