Wireless extension: WRT54GS & WAP11?

I have an old building with an existing network. The existing is as follows: DSL Modem connected to a Linksys WRT54gs running on 192.168.9.x. This router is located below ground level to serve as a wireless 'hot spot' for select members of the organization. Connected to that is another WRT54gs (cat5e) that supports the administrative office. The wireless is disabled on that router and it only runs wired at 192.168.3.x Now, I have a person in another department wanting internet but he is on the other side of the building and running cable is not practical at all. I have easy access to drop a cat5e w/in range of the wireless router at 192.168.9.x and have a WAP11 sitting around gathering dust. How can I set up the WAP11 to act as a sort of remote wireless card to relay the internet connection back down the wire?

I can see how it is done but I seem to be missing something...I cannot get the WAP to connect wirelessly to the router and wired to the pc w/o sticking another router in line....at least not that I can see. How do I make the WAP11 share it's connection???

Maybe I have the wrong stuff involved here. I have a hacked WRT at home that does a nice job of this...just wanted to use the WAP11 for something useful. Any solutions?