Installing Windows XP

I am trying to replace ME with Windows Home Edition on a
Compaq Presario 5000. The Upgrade Report indicates that my
current Network adaptor is a Network Telesystems P.P.P.o.E.
(NTSP3. When I install XP I am not able to get into the
Internet. Microsoft and SBC ( my DSL provider) say I have
to upgrade the network driver to make it compatible. How
do I do that?

This is frustrating.

Thanks.