Well it worked...
...somewhat. Anyone trying to acces the wireless Linksys on the south side of the house has to use a password, however the north side is still unprotected. Since the Buffalo is wired directly into a LAN port of the Linksys anyone trying to access it gets in. I have to set the same password for the Buffalo but I can't access the settings screen for some reason. I keep getting a can't connect prompt. I'm thinking that it's because I have it set as a switch. Time to call Buffalo technical support.
Thanks for the input guys, much appreciated.