Combine Models

I’m working on a fairly large model which I have split up into 3 parts. I am working on 1 part while two others are working on the remainder. Everything is done so now I want to add their work to my model. Is there an easy way of doing this or do I need to recreate their work in my model?

There are a few ways of doing this:
1 Drag in a visual tool and move all objects into the visual tool. Add this tool to a user library and save the user library off. Then the other person can open the library and drag in the other part of the model or save his part of the model to the librayry as well
2 Save individual nodes in your model as .t files (in the tree, right click, select node and then: Save Node as) and in your other model create a node and load the .t file into that node
3 read up on the ffm options in the user manual (search for ffm or xml)