The best way to copy the disc -- the actual disc -- is to read the ISO in
ImgBurn (freeware) to a temporary ISO files on your hard drive, and them write the ISO file to a new disc -- again, in
ImgBurn. A guide for this process, using the pre-ImgBurn
DVD Decrypter (near-same program) is at
http://www.digitalfaq.com/guides/vid...-decrypter.htm
If you've already copied the folders off the disc, and want to burn from those non-disc locations, then you'd want to use ImgBurn in build mode (write files to disc). Be sure it's on UDF 1.02 + standard ISO 9660 mode for the burning type. ImgBurn is usually able to "smart detect" when content is a VIDEO_TS and AUDIO_TS, asking to switch to UDF+ISO if you've made a mistake.
See image:
imgburnUDF.gif