If your normal internet connection is by dial-up then you have to create a DUN, (Dial-Up network), connection in "My Network Places".
If your normal internet connection is via broadband modem, you usually only have to connect the modem to the computer and you're away. You 'may' have to connect to a specific web site provided the ISP to input the username and password given to you by the ISP, but the ISP Help Desk will help you there if you cannot remember those details.
If the connection is by DSL then I can't answer as I have never used it, but perhaps you can check the ISP's web site on your own computer for set-up details.
You mention Ethernet. If this is an Ethernet problem and not an ISP problem then how did your husband reinstall XP? Did he install all the correct drivers as well?
My husband's computer was virused, and without thought, he wiped it clean, and put windows xp back on. Now when we try to connect to the internet with it, it says there is no ISP. When we go into Network Connections it's blank.
How do I get it to read that it is connected to the ethernet?