Epson AcuLaser C4000 Owner's Manual page 136

In Windows NT 4.0 printer server, the additional driver for
Windows XP/2000 clients is the "Windows NT 4.0 x86" driver
which is installed beforehand as the printer driver for
Windows NT 4.0. When installing the printer driver in the
Windows XP/2000 clients from Windows NT 4.0 printer
server, the driver for Windows NT 4.0 is installed.
You can not install the printer driver for Windows XP/2000
as the additional driver in the Windows NT 4.0 printer server.
To install the printer driver for Windows XP/2000 in the
Windows XP/2000 clients, the administrator installs the local
printer driver in the clients from the CD-ROM which comes
with the printer, then performs the following procedure.
1. For the Windows 2000 clients, click Start, point to Settings,
and click Printers.
For the Windows XP clients, click Start, point to Printers and
Faxes. For Windows XP Home edition users, point to Control
panel first, then click Printers and Faxes.
2. For Window 2000, double-click the Add Printer icon, then
click Next.
For Windows XP, click the Add a printer in the Printer Tasks
menu.
3. Select Network printer (for Windows 2000) or A network
printer, or a printer attached to another computer (for
Windows XP), then click Next.
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Setting Up Your Printer on a Network