I have a bunch of downloaded mpg1 files which I would like to convert to mpg2(DVD) and merge together so that I can burn them to DVD. Or is it possible to author a DVD with more than one mpg2 file, one following another? (The way one can put more than one mpg1 on a VCD.) What is presently the best/easiest software to use for this kind of massaging? Any freeware?