Ahh, since my computer doesn't have a wireless card, and one of the others doesn't either, I guess that's out. The signal from the one with wireless isn't strong enough without using the range extender because of distance/interference.
Thanks for the clarification.
In that case, you can still make it work, but it's a little more cumbersome. Here's what you do:
Step 1: Plug the USB thingy into a Mac.
Step 2: Turn on Internet Connection Sharing on that Mac and tell it to share via Ethernet.
Step 3: Run an Ethernet cable from that Mac to the
Internet port, not a regular Ethernet port, on your Linksys router. The Mac now becomes the equivalent of your old Internet connection device.
Step 4: Connect your othe computers to the Linksys just as you do now.
