If I remember right, I used to use a program called DVDshrink. I was a little confused when I first started using it but got it figured out pretty quick and it worked pretty well.
Many of the bluray disks offer a digital download with the disk purchase.
Many also come with the std DVD format as well.
So you end up with 3 options for 1 price that's not much more than the cost of just the dvd format.