Hi. Sorry for the multiple posts; I'm going to purchase a Linksys B Router for my Dell PC and G3 iMac. I just have a few questions: 1) Do I need to buy an Airport card just to connect my G3 iMac to a cable modem using the router? 2) Is it easy to set up? 3) How do I set it up? Do I need to buy the router, and cables for the Dell and one cable for the iMac? Thanks.