No Linksys disk

Hello,

I recently relocated to a new abode and have hooked up my computers and everything so that I can resume my uneventful life, but I want to make my internet access password protected, so that outside sources cannot be all "rahrahrah"... I have two roommates running wireless internet and the Linksys router is hooked up directly to my laptop and desktop, but I am unsure how to set a password.

The kicker? I cannot find my Linksys instillation disk or manual. I require help, and would mucho appreciate it.

/Avidwebbrowser