I bought a DVD-VCR Recorder the other day, I am planning to use it for recording my VCR family movie tapes over to DVD. I found out that not all DVD players use the same format, the one I bought uses the DVD-R and the DVD-RW. The DVD players that my family have won't reconize the DVD's that I recorded to. Are there DVD-VCR Recorders that will record to the -R's and -RW's in addition to the +R's and +RW's? any suggestions? How do the DVD's that you buy that are prerecorded (such as movies) work on both types?