You determine the location where you store the .pc3 files in the Tools
menu -> Options -> Files tab -> Printer support path.
The way I handle this issue is by duplicating the default folders on the
server, i.e., a Plotting folder with a DRV, Plot Styles, and Plotters
subfolder. I also pointed all of our workstations to a common Content
folder on the server so that updates to MVblocks, tags, etc. would all stay
in one location.
Cheers,
Christopher