Am I right in thinking you want two printers? One for best work and the other for draft work. I have two printers on my computer
Printer No1 is a Cannon PI4700 which I use for quality work I.E. photographs and letters.
Printer No2 is a brother laser printer HL-2030 this I use for print-outs of emails and instructions or any draft type work. Printer No1 the Cannon is set to default on my tower and I have a laptop on homegroup and the No2 brother is the default printer. In all cases they were installed as you normaly would install a single printer without any problems.