log onto 2 different networks?

I am on a Win2K laptop… it’s a company laptop so i dont want to change any of the network settings when i want to plug the nic into the company network. but when i bring it home, i would to plug it into @Home’s cable internet. of course they havea whole different setup with diff computer names and etc. My question is.. How would i set up my computer to use both networks? I recall something like a “netswitcher” program? please advise. Thanks, Kyle