Here's a copy of my /etc/cups/printers.conf file for comparison, while not the same printer it should provide you with enough information to configure yours using;
http://127.0.0.1:631
Basically you want JetDirect printing to the printers IP address and port;
# Printer configuration file for CUPS v1.2.7
# Written by cupsd on 2006-12-11 09:05
<Printer HP-Deskjet-5650C>
Info
Location
DeviceURI socket://192.168.49.100:9100
State Idle
StateTime 1165845919
Accepting Yes
Shared Yes
JobSheets none none
QuotaPeriod 0
PageLimit 0
KLimit 0
OpPolicy default
ErrorPolicy stop-printer
</Printer>