Does anyone know how to get the subtitles to work in FFVII:AC movie?

I recieved this movie file from a friend and there is a seperate file called

Final Fantasy VII AC ENG Subs.srt

How do I get the [english] subtitles to work on the movie file [read: video clip file]?

Does anything need to be combined with the movie file to enable subtitles to work?

Please can anyone help me?