download? dont know what you mean by that. Also what kind of editing software do you have? You will need some fairly good stuff to do this.
Here is how you can get started. download this, it contains all the nessacary tools to rip DVDs so they can be editble in 5.1 and in mpeg 2 format.
I also recommend this site. http://www.divx-digest.com/
If you cant find what you are looking for, I am sure there is atleast one person in that forum that could help you out.