In the [global] section, specify the new file as your printcap.
The server will only recognize names found in your pseudo-printcap, which of course can contain whatever aliases you like.
Typically the path specified is that of a world-writeable spool directory with the sticky bit set on it.
A typical [printers] entry looks like this: All aliases given for a printer in the printcap file are legitimate printer names as far as the server is concerned.
Internal whitespace within a parameter value is retained verbatim.