The file I have came in a winrar archive. A large over 4 gig file which plays in windows media player and is great quality. I cant seem to be able to convert it to iso in order to put on a dvdr blank media. Can someone help me I'll make other posts with more info if required. This file is a movie file as per above but its extension is not a recognized one...strange! anyway if anyone can help it'd be much apprec.!!