Media player metadata for multipart movies

Hi, just started ripping a number of DVDs to my NAS and in general I’ve had excellent results with Meda Player and metadata.

I’ve come across a curious situation though with a multipart film, The Lord of the Ring extended edition. As these are two part DVDs (and I’m too lazy to spend time combining them), does anybody have a way of marking the files as part one and part two but still allow the metadata fetcher to correctly mark them in too parts? Alternatively how do I manually create the metadata?

Thanks very much,