There is a freeware program called DVD Decrypter that allows the user to rip the DVD Image, in most cases, .ISO, directly from the disc.
It can also re-burn ISO images onto blank DVD's.
You can download it here:http://www.mrbass.org/dvdrip/
And Here is a guide on how to use it, it's relatively simple, but you might want to have a read:http://www.afterdawn.com/articles/archive/..._dvd_2_dvdr.cfm
What exactly were you seeking to find out about the process of ripping and burning DVD's, I may be able to tell you what you want to know.