OS 10.4 - EXPERTS NEEDED: can I UNinstall an Airport update?

I live in a big, strangely-shaped house that I share with lots of people. I was thrilled to figure out I could put the wireless router in the closet in the living room and get on the network from my bedroom, without taking coverage away from anybody else.

Until now. I just this morning ran the software updater to take me from 10.4.3 to 10.4.4, and I figured I'd install the latest airport update while I was at it.

I am so bummed.

I can no longer access the network from my room. I can still get on, but I have to hang out in the hallway by other people's rooms.

Why would they do this?

Is there any way to get to where I was before running this updater?

Help guys!

tanx,

J