I have a cd rewritable drive and a dvd rom drive. I downloaded the dvd decrypter v3.5.4.0. Can I burn a dvd with these things or do I need to buy a dvd burner? I have been trying to burn a dvd following the instructions on this page http://www.afterdawn.com/guides/archive/small_dvd_2_dvdr.cfm Thanks for the help.