The options are all Built in on the Fiery itself, so you simply need to configure your Windows Printers to point there.
In the "Printers and Faxes" window, bring up the Properties of your Xerox 240/250
Then go to the Ports tab across the top, and choose "Configure Port" in the middle of that window
Currently, you probably have Raw 9100 as the print option. Change it to LP / LPR and now it will prompt for a Queue Name
In the Queue Name Field, enter one of the following in all lower case:
print
hold
direct
Now you'll be able to print to whichever queue best suits your needs.