This is just something I happened upon, no big deal really, but when copying a DAT from a VCD to my HDD in order to use a small clip from a movie (an old James Mason flick called "A Deadly Affair") in a cheesy short video, I discovered that Ulead Video Studio 6 can open the DAT without first actually converting to MPG (to get the header right) or even changing the file extension to MPG. I figured that it probably could, but I wasn't sure. In any event, it sure is a lot faster to open it on the CD, find the clip, trim the clip out then save that clip (re-mux it actually, no quality loss) than it is to copy the whole thing to your HDD.