DVD recorders


Does anyone know if you can record over a tv program or other video file on a DVD disc using a DVD recorder similar to what a VCR can do with a tape? In other words, you record a program with your DVD recorder, you watch the program, then you don't need it any longer so you want to re-record over the same part of that DVD disc. Anyone an expert on this out there?
pdn
Why not simply get a dvd recorder with a hard drive, such as Sony's RDR-HX900. It has a 160GB hard drive, record what you want, delete what you want, and only record to disc the stuff you want. Great machines!
Thanks for the feedback. What I'm trying to do is evalute a DVD recorder that also plays music from live concerts better than average. I'm looking for the best of both worlds, recorder PLUS higher end audio performance. Thanks again.
Are the DVD RW disc's the same as CDRW's in that they sometimes can only play on the unit of origin? Many CDRW disc will only play on the computer they are burned on.
A DVD recorder that records to DVD-RAM. A RAM DVD can be rerecorded on 1000 times. This is about 10 times more then a DVD-RW or DVD+RW.