Check out BUTCHASOUND’s post in this thread:
http://www.elektron-users.com/index.php?option=com_fireboard&Itemid=28&func=view&id=223687&catid=9&limit=10&limitstart=20

That should help out. That said, it’s still a huge pain in the ass to combine projects. I really wish there were an easier way around this. As it is, if you want to play a set, you really have to make all the tracks in one project from the start.

When I brought this issue up before, the best suggestion I got was just to buy a 2nd Octatrack. Maybe one day…