My brain is fried and I'm having trouble thinking this one through. A friend of mine just got an intel macbook pro and I thought that I may be able to somehow use it to run a Windows app that I need.

But I don't want to put my junk on his computer so I was wondering if it is somehow possible to me to get a small external drive and boot from that.

Do I need to first install OSX on the external then use Bootcamp to create another partition for Windows. Is this the right way to go about this?