An in depth tutorial on how to install Windows 7, 8, 8.1 on OS X Yosemite.
For those with the new MacBook Pro's with Retina display or iMac's, you won't actually have the first option in the BootCamp assistant. That's because you don't have built in DVD Drive. Here's how you can make the first option visible.
https://www.youtube.com/watch?v=wxj27...