LINKING FULL PROJECT FILE AS 'EXISTING' CONSTRUCTION: For demo and renovation work 

This Revit Tip expands on the one I made a couple months ago named "DEMOLITION ITEMS IN A LINKED FILE". This takes the topic even further and shows how to take an old project file and use it as a LINKED existing model for renovation and demolition.
There are only a couple things you need to do to prepare the file for use.
Enjoy.
-------
If your company needs BIM/Revit Assistance.. you can get help without hiring an in-house BIM Manager.
A virtual BIM Manager (me) means you and your team can get immediate help (and ongoing assistance) without dealing with the overhead of hiring someone full time.
Check out my website for more details:
www.virtualBIMmanagement.com