If you use your Win2K notebook in a variety of networks (e.g., at different customer sites), you probably always have to change the network settings.

The standard Netsh utility lets you save your settings in a file that you can later use to restore your complete network settings.

To Save the current Settings, type the following command:
netsh -c interface dump >networksetting.txt

You can then create a dump file for every network that you use.

To load a set of settings again, type the following command:
netsh -f networksetting.txt

Using the Netsh utility, you can also easily switch between different configuration settings.

Other options are "MultiNetwork" Manager from GlobeSoft and "Net Switcher" from Netswitcher.
These 2 tools are cool but not free.