drowninthemusic

Hey, I have never set up this type of network before and I am not really sure where to configure most of it. I am running 8 computers all through a unmanaged switch>router>modem. I want one of the computers to be the server that controls user logins and also acts as a file server...I know I need to setup a domain, but how? Right now everyone is on the same workgroup and all the computers can see eachother and share files... can anyone help me with configuring the server and getting all the other computers to login through that domain? I am running windows XP Pro on all the machines... Linksys 16 port switch Linksys 4 port router. Thanks