First you have to unpack, extract that ISO. You can use Winrar, Isobuster, or mount that ISO on Nero's Image Drive, probably the easyest. After extraction, depending what is in the ISO(most likely a dvd structure, with a bunch of VOB files), you can use diffrent programs to convert to an avi. If your ISO is indeed a DVD, you can use AutoGK(free) to convert to AVI.
Quote:If I burn a DVD what extension (.avi?) will it be burnt
Yes, it is possible.
How big is the ISO? If it is small enough to fit on a DVD 5, you fire up Nero Burnin Rom
Choose Recorder / Burn image
Browse to the location of the ISO file and select the ISO file you want to burn to dvd. Make sure you set the burn speed not higher than X8.
If that ISO is the copy of a DVD-Vidoe, the result should be a DVD that plays on your standalone player.
http://www.hiren.info/pages/how-to-burn-iso