My friends and I have a 4 bedroom on campus residence apartment for the school year. We are getting our internet through the schools wireless 802.11b wireless network. But we also want to network our 4 computer together to share files and play lan games. Each of us will have a 802.11 card in our computer to recieve the internet. Can we also network our 4 computers together using a 802.11b/g wireless router and the same cards we use to recieve the internet or do we each need to wireless 802.11 cards? Thanks.