I work in 1 of 3 different networking environments at any given time

I work in 1 of 3 different networking environments at any given time.
I'm new to the technical side of networking.

I have a client with a large IT staff, they modified the TCP/IP NDIS 1394
Net Adapter entry so I can be connected to the internet when I'm there. I
bought a D-Link Wireless G DI-624 router and DWL-G650 Adapter for home, and
I need to connect to the Internet (high speed Zum PtoP when in the hotel).

When you change one of the TCP/IP entries, it seems to change the others.
Can Windows ME handle entries for 3 different networking environments at the
same time?