check the LAN advice at PU/OsX -- it's about LANning a Mac, but it's relevant to PCs too.
I'm guessing from your IP thread you want to find out what you & yr friend's IP is -- you don't need to. For a LAN, YOU tell the PC what ip you want it to be.
check yr Network control panel. get the properties for yr Ethernet card up -- under the Bindings tab make sure that TCP/IP is checked.
(go to
www.grc.com for a really good explanation of what all those things are & what bindings are)
Under win98 you'll get an item in the main Network panel list called:
TCP/IP -> {name of yr ethernet card}
go to the properties for this item & set your IP there.