These links will show you where to find the place to enter these numbers.
Please note: DNS numbers will not help you connect to the Internet.

Right click on "My Network Places" Left click on "Properties"

Right click on your dial up connection, Left click on "Properties"

Here you can enter your dial up number

This is the modem configuration screen

On this screen highlight "Internet Protocol" Then click on "Properties"

Here you can enter DNS or IPs

DNS Settings