I need help on how to configure 4 computers for a wireless network... I have a wireless router, wireless network card and a modem.. please I need it urgently what are the procedures involved.. thankssssssssss for your anticipated help

The router should come with documentation, have you read it? What configuration do you want to do? To just share the Internet, you need to connect your broadband modem to the router, then run the Wireless connection wizard on each wireless PC.