|"how do I set up an ethernet connection and change my settings on IE or Mozilla"|
If it's a Win98 machine and you already have a ethernet network adapter in it, then you should already be good to go. The providers' software may be an issue, if your DSL provider requires software to connect (most don't). Browsers shouldn't require any changes, they just want to see a connection to the internet, though you may have to completely remove the dial-up connection..
"Channeling the spirit of jboy..."