Hi

I've tried a search but can't find anything about this, so hopefully someone can help me out

I've got quite a lot of music that I am copying across to my new MBP, and am trying to save as much space as possible. I have a lot of songs where they are on an original album and also on a greatest hits or compilation cd. Is there any way to just have one instance of the song, but have different links to it in my iTunes library, rather than having to have the mp3 on my hdd four times?

Thanks in advance