Use the one in the tutorial, that one worked for me.
Made a bootable usd with the cent os iso nd the program in the guide.
Will try to boot it up now... the usb is also 8gb so should be enuff space...
Edit: Still the same result...
Boot failed, no root device found
Sleep forever
Dont know what to do now...
Edit 2:
Cant get it to work, will just run with win7
