Without customization, the best practice would be to open a drawing that contains the plot settings you want, start pagesetup, either verify that a saved page setup exists or press the new button (if a saved page setup doesn't already exist). Then open each drawing that needs the page setup, go to the first layout and then import the saved page setup from the good file. Then click on each layout, pagesetup and choose the saved page setup name and push set current button. Having each layout set to a common name really reduces the time it takes to setup and modify plots. It should only take a few seconds for each layout.
Automating it would involve learning to customize >>here<<
I may have misunderstood the situation. I think you could just use the options command to set a new default printer so that the none printer won't be substituted each time you open a printer set up for the old print driver. Try setting the options to default to your new printer.
I have started setting the dwf6 eplot to the default printer and always eplot first. Then from design review, I either plot to pdf or to the physical printer. That way my layouts are always ready to plot regardless of location.