Collaborating with your music is amazing experience. It lets you bring new perspectives to your tracks, outsource to other musicians to use their strengths, and it's just straight up fun as hell. Ableton Live is a great platform to collaborate with, but it takes some knowledge. It's really frustrating when you get that "Media Files Missing" or "Missing external Plugin" notification when you open a file. That's why I made the (aq) Sharing Files PDF.
Check out the full article here: http://subaqueousmusic.com/sharing-your-tracks-and-creating-live-packs/