If you own a CD-ROM version of Britannica 2003 and chose a Typical installation, you will be prompted to switch discs, depending on the feature you are using.
When the disc-change
prompt appears, don't click OK
just yet
Windows
users: if you get a message, click Continue,
and proceed to eject the disc.
Insert the requested
disc and close the CD tray.
Wait for the new disc to "spin up" and click OK if necessary to continue.
If you have over 1 GB of free disk space on your hard drive,
you can avoid switching discs. Remove your current installation. To do
this, you must uninstall the Britannica program, and re-install, choosing
the One-Disk or Complete installation type. These installation types eliminate
the need for disc-switching. See Installation
Types...