I am trying to burn css movies for my stand alone DVD-R player with DVD decrypter. I know the file size is acceptable, I know the disc I am burning to is acceptable. I am burning files that have been through decryptor and and placed on my hard drive with either an .ISO or .MDS suffix, my stand alone dvd will not read the discs. Do they have to be in .DVD format? If that is the problem...how do I convert them?