I know a few people have asked how to do this, but what I would like to see in a future version of DVD2One is the ability to merge the two sides of a flipper DVD (slang for a double sided DVD). I have several flipper discs that I would like to convert to a single sided disc for playback purposes.
I know some people say the quality would suffer, but really, no more so in most cases than taking a dual-layer DVD-9 and compressing it down to a DVD-5. Most of the flipper discs I own are single layer (DVD-5) on each side.
I have an older copy of the movie Seven, for example, which was released as a flipper. The obnoxious part is that you have to flip the DVD over in the middle of the movie to watch the whole thing. It would be nice if DVD2One let me merge the two sides into a single image that I could burn.
Similarly, all of my Spawn animated series DVDs are flippers. It would be nice to back each one up onto a single-sided disc for convenience and archival purposes.
Obviously, I wouldn't do this with a DVD-18, but I only own one of those -- The Stand miniseries was released in the U.S. on a single DVD disc, double sided, two layers per side. There's no way I'd try to compress all that onto a single DVD+R.