I have 2 printers set up and use an a/b switch box, install both printers and drivers and then go to start/settings/printers the printer with the check box is the default printer, but if you are using any program like a word processor or spreadsheet etc when you click on print, a dialog box will open, just select the printer you want to use and turn the switch on the a/b box accordingly and all should be fine. Hope this was of some help
PS this is the setup for a LPT Parallel printer the USB type printers should also work the same minus the A/B switch box .