- open your web browser (ie, mozilla, etc) and type
http://my.router or
http://my.WL530g or
http://192.168.1.1
- it'll prompt you to connect, type "admin" for the username and password
- it'll prmpt you for the router's web user interface, click on "wireless" located at the left part of the page
- then select "interface", you can change your ssid from "default" to a customized one (e.g. your name) so that you'll be able to verify that you are really connecting to your own network
- you can now select your authentication method, i recommend the "wpa-psk" since it's more secured than wep (but you need to make sure that your wireless computers can support wpa-psk, hence use "open or shared key"; wep-64 bits will ask for a 10-hexadecimal key), wpa will ask you for an 8-character key
- then click on apply to save your settings
hope this'll help you.