You should be able to save them as SVCD, which uses MPG2 format and is readable by all but the oldest DVD players, I think. Obviously, they have to fit in a CD.
I don't know what codec DVDs use... I thought they used MPG2 as well? If that's the case, some DVD authoring program should be able to write them to a DVD-R without the need to re-encode them
EDIT: If they don't, I think you can still use the SVCD option in most burners to write to a DVD, and probably the player will recognize it anyway.