[webber]

check each file by just highlighting one at a time in the given directory and see that they are roughly the same except for the .nfo or .sfv and the final one in the collection, ie:they are usually 19.0MB if it is more or less then its not complete or you downloaded it wrong,
if the image is right and you do have a 791MB image try using a 80minute cd/700MB capacity (just because it says 700MB doesn't mean that is the limit)

regards
webber