How do I set a password for my wireless airport connection on my linksys router ? I don't have any directions, threw them away apparently, just plugged it in and it's been working fine from my Imac to my MacBook but I would like to exclude neighborly free usage. I went to the Linksys website and it's all about PC's. I don't know what the original password would have been so I don't know if I could access and then change it. I heard multi-shared usage will slow down the connection. Is this true? Thanks