At least in Windows 7 RC1, I used the DVD burning facility built in to MC to archive a favorite movie. It kept the 16:9 aspect ratio and the 5.1 Dolby, along with creating 13 chapters on its own. It did have to reduce the image quality of the WTV file (720P) a little to get it to fit onto a regular 4.7GB DVD. I'll try it with another movie and a DL DVD.
Bye.