Hi. I was using ImgBurn, as per the guide, to make a dvd from a folder of .vob, .ifo and .bup files. I was burning this onto a DVD+RW disc. However, the finished DVD is playable on some of my DVD players but not my portable Panasonic DVD-LS50. Admittedly, this is a pretty old model but it seems to play recently released DVDs just fine. Also to note, the ImgBurn guide to burn a folder has worked for this portable player before. The DVD I'm trying to create is a fan edit of the Superman movie international version so it just may be a result of the way it is authored. Is there any way to make it more compatible? Thanks in advance.