there are various softwares out there allowing you to rip audio from dvd's. You may have to buy sucvh a software though, as many of ther so-called "free" ones are not free when you finally get them downloaded.
so you just rip the audio, then import it into reason as you would any other audio file.
I had an idea for a script once. It's basically Jaws except when the guys in the boat are going after Jaws, they look around and there's an even bigger Jaws. The guys have to team up with Jaws to get Bigger Jaws. I call it... Big Jaws!