You can set up standard locations for file paths to standard Families and Templates in the following way. You will need to do this at each workstation if Revit has been installed.
-Go to: Application 'R' menu
-Add the name of the location and then browse.
I don't recommend pointing your rendering library off the local machines. This will cause a serious slowdown in rendering times.
The locations will then be available on the left-hand side of 'load' and 'open' dialog boxes.