DVD selections - mix and match?

[David Thrasher]

I have a little question for when I finally get a DVD burner. If I made 2 DVDs with short films on each would it be possible to take selections from each to make a 3rd DVD. I know of course that you'd have to create a new menu but I was wondering if the files were tied to the DVD they were made for or if you could take film #1 from DVD A and film #7 from DVD B and put the files on DVD C without having to reencode files other than your menu.

-Dave