You would need to replace every cutscene in the game, not just one of them. but I don't own this game so I'm not sure how much space it would save, or what can be removed.
If you plan on keeping internal backups, it is basically necessary to upgrade the internal HDD. This is especially true if you have only an 80GB or 40GB internal drive. There are a few games that easily take up 40+ GB.
someone who has a copy of the game will need to examine it and test what can be removed. alternative language AUDIO files, video files etc are probably the easiest to remove/replace.