Micros 3700 Printer additions

I run a restaurant using Micros 3700 POS system. The
tech service for
micros through the company we bought the system is a
joke, they know
less than I do and charge $125/hr.

I want to use an HP 3820 printer with the PC that is the
server for the
POS system. Currently all printing goes through the little
thermal tape
printers at the workstations. So, how do I go about
adding the HP
printer in 3700?

Thanks.