RE: ms project
Hi Emma
Thanks for your question. To link two projects first create a new blank project.
From the insert menu choose Project file... then browse to the first project you would like to insert.
Repeat the process to add further projects.
Your new combined project file is a master document. You can then drag and link between the bars of tasks across projects. Once your link is in place you can double click on the dependency arrow to change the type of link you have made.
I hope this is useful - do let us know if you have any futher questions.
Kind regards,
Andrew