so you have a lenovo laptop, linksys wrt54g wireless router and a lexmark wireless printer. And you wants to secure your wireless network. Just follow the instructions ---
SETTING UP WIRELESS SECURITY ON YOUR ROUTER--------
1> connect your lenovo with the WRT54G at port no. 1 it is very imp. to hardwire your computer, also check for the light status of the router to ensure that it is connected.
2> access the router setup from a web browser (may be using 192.168.1.1, the default address of your router, and admin as the password.). You can also go to kb.linksys.com if you need more help to access your router setup.
3> at the top click on wireless on the BLACK bar at the top.
4> under wireless click on wireless security on the blue bar.
5> select the security mode as WPA-PERSONAL (best encryption and supported by all devices).
6> select WPA ALGORITHUM as TKIP.
7> in WPA Shared Key type: "superman
" or any thing else but it should be at least 8 characters long. and you should remember it as this will be your wireless password.
8> the Group Renewal key should be 3600.
9> Click on save settings at the bottom.
PERSONALIZING YOUR WIRELESS NETWORK NAME--------
1> Under Wireless, click on Basic wireless settings.
2> MODE: mixed
3> NAME: <WHAT EVER U WANT> CHANGE IT eg NINJA, SPIDER etc
4> Channel: 11
5> SSID BROADCAST: ENABLED
NOW YOUR ROUTER IS CONFIGURED.
Now u jest need to connect your laptop and printer to this new secured wireless network using the security key and i am damn sure it will work.