Two Films with the same name - problem

Hi all

I have both versions of The Girl With the Dragon Tattoo in my iTunes library which I have imported myself. Whilst these show as separate movies, they are in the same folder even though I have tried to chnaged the name of one of the films by adding the year and moving it to it's own folder. When I re-import it, iTunes moves it back into the other folder with the other movie.

The reason this is annoying is that Plex is scanning my movies folder and cannot distinguish between the 2 films so I only end up being able to play one of them.

I think it's a metadata issue as the file name change doesn't seem to work. Anyone got any ideas on what I need to fix?

Thanks

James