If i recall correctly, reading the entire message directs you to See
Windows 2000 Help which will direct you to the location to make the
adjustment. And I quote
To change the maximum size of the computer's registry
Open System in Control Panel.
On the Advanced tab, click Performance Options, and under Virtual
memory, click Change.
Under Registry size, type a new registry size in megabytes in the
Maximum registry size (MB) box.
Notes
You must be logged on as an administrator to the local computer to
change the registry size.
To open a Control Panel item, click Start, point to Settings, click
Control Panel, and then double-click the appropriate icon.
Setting a maximum size for the registry sets an upper limit on how large
the area designated for registry data can become. You might need to
increase the maximum registry size if the amount of registry data
produced by programs exceeds the limit you set under Registry size.
