Rick,
Are you asking what you need to do to go wireless and eliminate your wired ethernet connection you are currently using?
If so, as Larry mentioned also, you need more than a wireless router. You need a wireless bridge or similar device to connect to your stoker so it can connect wirelessly to your router.
A router like that must be hardwired to your internet source ( your house connection or another router ).
I use an ASUS WL-330gE Multi- Functional Wireless AP setup to serve as a bridge to connect to my Linksys router that serves my house. I didn't want to buy a dedicated bridge or one of those goofy gaming adapters.
I like the WL-330gE as it is really small and simple, not too expensive and it can do a whole lot more than what I'm using it for should I ever need it to.
Note, if you are good with networking, you can reprogram your WRT54G to act as a wireless bridge by using DD-WRT firmware ( search for it ) - assuming you have another wireless router that serves your house.
Mind you that this endeavor can be rather frustrating, I tried it but lost my patience with it. It is possible, but you have to be very careful. My issues were around maintaining the level of security in my wireless without making compromises.
Good luck,
Pete