windows 8.1 hdd separate

Hi dear people ! I have a question. Currently, i am running OS X10.8 beautifully on my Hackintosh. But i want to start to use Windows 8.1 also. I had the idea of putting an extra (SSD) drive in my HT , just for Windows 8.1 to put on. But how to install Windows 8.1 on that drive ...