Want to dual boot Windows 7 on two HD'

So I have my 1TB drive, I use it for everything and it has my first install of Windows 7 on it, now I have another HD (80GB) and I also want to put Win 7 on it so I can experiment with things on my other HD without harming my first HD. So how can I dual boot two Windows 7 OS's?

unplug the other drive plug the 80 in. install. then plug both in. you can pick which one to boot to through the boot menu. Doing it this way makes it so you don't get a prompt asking you to choose which to go into it auto goes to the 1TB (or it should.) and when you want to go to the 80 gig you can pick it through the boot menu.

Thank you :D