Hi Samantha,
Perhaps the easiest way is to create a consolidated project by inserting
the project files into a master project (Insert > Project). You can
then simply select the predecessor tasks from one project, press and
hold the CTRL key to select the successor task and then link them using
the Link Tasks button on the Standard toolbar.
I hope this helps. Let us know how you get along.
Julie
Project MVP
Visit
http://project.mvps.org/ for the FAQs and additional information
about Microsoft Project