Lately, I've been meaning to network 2 computers in my house (and maybe my X-Box) so that they can use my cable modem. I'm a complete newbie at this, and was wondering what I'd need to do this? Also, are network kits a good route to go? Will networking slow the connection down on the computer the modem is hooked up to? Will files be shared in between the computers? Can I play games head to head via the computers? Thanks.