DVD Backup Question

[Dr Phibes]

I just got a DVD -R burner and its great but does anyone know if there is a way to know what the small files are on he DVD list? i know the big file is the movie but i get small files listed and I'm not sure if i want to keep them or not. they could be trailers or audio commentary,etc.. is there a software that will play those files so i can see what they are? also when you have to put the movie on 2 disc's, whats the best to do it without making the movie just stop. is there a way to fade out so as to look a bit more pro like? thanks