How to connect iMac via Ethernet and still have wireless available
I have an iMac running Leopard. I have Earthlink DSL with PPPoE. Just bought an Airport Express Dual band. I have a primary and guest wireless network set up. What I want to do is leave that alone and connect my iMac via the Ethernet cable that used to go to my DSL modem because there is no reason for my desktop to be on a wireless network. How do I do that? I have to be sure I do it correctly the first time because in trying to follow the instructions in the configuration guide I could no longer connect and it is very difficult to ask for help after that!
Thanks in advance.
iMac, Mac OS X (10.5.6)