I went to burn a copy of Identity to a blu ray disc last night, fortunately on a BD-RE, and noticed that everything was fine until the main movie was about to play. Quite awhile ago what I had done was renamed the main movie file "main movie" instead of leaving it as its file number. I also deleted a number of unwanted extras to save space on the hard drive. My question is simple: what is the file number extension of the main movie so that I can burn it to a BD-R/RE? Anyone who has it on their hard drive would simply need to take a look at what number the main movie is. Thanks.