The <monitoredPrinters> section

Altering the .config file will affect the operation of the application and should only be undertaken by an administrator

In this section you add the names of all the printers that you want to monitor.

<monitoredPrinter DeviceName="Microsoft Office Document Image Writer"/>
<monitoredPrinter DeviceName="\\printserver\HP Laserjet 5"/>

The above example is monitoring a local printer called Microsoft Office Document Image Writer and a network printer called HP Laserjet 5 which is on the server printserver