Software to toggle TCP/IP settings?

I have a Thinkpad running W2K Pro that I continually take back and forth between home and office. I connect to our office LAN which uses DNS and I have a static IP address. At home I just got high speed internet access using the radio spectrum, butit connects via my nic. During setup I had to check “Obtain IP address automatically” in the TCP/IP properties. This wipes out my static IP info for the office. Is there software that would enable me to toggle back and forth between these settings w/o having to reconfigure every time?