HP Jetdirect 250M User Manual page 41

The best source of a driver for your printer is the Web, because that gives
you the latest driver. (The drawback of getting your driver from the Web
is that some drivers are quite large, and may take several minutes to
download at modem speeds. We think it's worth spending the time.) The
HP support site at
current drivers for most HP printers.
If your printer is an HP printer and you are running the installer from
the HP Jetdirect CD in the Autoconfigure network settings for me mode,
you can select the option to download a driver automatically from the
Internet. The installer will search the HP support site for a driver for
your printer and, if it finds one, will automatically download it and install
it for you. If you don't select the option to download a driver
automatically from the Internet, you can download one manually before
you run the installer.
In many cases the driver is the same one that is used for a direct (non-
networked) printer connection, and you can probably find the driver on
the CD that came with the printer.
In technical terms, what you need is a driver that installs using a .INF
information file (rather than installing by running a .EXE file). Make
sure that your driver files include the .INF file. (If you can't find the
printer's .INF file, you may have to download the driver from the Web.)
You may be able to find the driver on your operating system disc. If the
operating system is more recent than the printer, it probably includes a
driver for that printer.
If you previously had a direct connection from your computer to the
same printer, or a network connection to another printer of the same
model, the network printer installer may be able to use the driver that is
already on your computer.
The installer software takes the driver location you specify, finds the driver, and
installs it in your system.
When do I stop?
http://www.hp.com/cposupport/software.html has