so you want to install any Windows OS from a bootable USB key

Well this guy wrote it better than I can so so check it out, PS I have used this app and it works great.. PS this is a codeplex.com project.

http://blogs.technet.com/b/bobh/archive/2012/09/04/the-simplest-was-to-create-a-bootable-windows-server-2012-or-windows-8-usb-key.aspx

http://wudt.codeplex.com/

Adding a web brower to your core 2012 server

I am not sure why you would need to use a browser from the console of your core 2012 hyper-v server but there is a way and it works

just download
https://skydrive.live.com/?cid=f8e137f6fd1c75f2&id=F8E137F6FD1C75F2%21105&Bsrc=Share&Bpub=SDX.SkyDrive&sc=Documents#cid=F8E137F6FD1C75F2&id=F8E137F6FD1C75F2%21219&sc=Documents
firefox.cameyo.exe and run it on the core server and you will have a web browser you can use from the console of your server. Have fun surfing the web.