ANY ONE KNOW HOW TO MAKE OWN OEM WINDOWS VISTA DISC

I BEEN GOING TO WEBSITES AND TRYING TO LEARN HOW TO MAKE MY OWN OEM WITHOUT HACKS AND MAKING A LEGIT HACK ON THIS WELL I JUST SEE THAT IF PEOPLE HAVE ROYALTY USE AND SOMEONE DELETED THERE PARTION FOR THERE RECOVERY OR SOMTHING THEY SHOULD BE ABLE TO USE THERE OEM ROYALTY KEY WHICH IS MVL SO ANY ONE I KINDA GET HOW TO DO IT BUT IF SOMEONE CAN EXPLAINA BIT BETTER