I believe that the HP Universal Printer driver should work. Here is an excerpt from the Specifications tab:
Server operating systems supported:
Microsoft Windows Server 2003 SP2 Datacenter, Enterprise, and Standard Edition Architectures: x86 and x64 Services: Terminal Server, Cluster Server *Note: Microsoft retired mainstream support Microsoft Windows Server 2003 in July 2010. HP will continue to provide best effort support the current UPD and tools for the discontinued Windows operating systems.
Click the link below to learn more and download the drivers: