Yep.
Im no expert as I just installed my Linksys DSL 4 port router.
Got all 3 of my pcs on one connection.
Router is logged onto my ISP with my username & password.
And I have it set to PPPOE & KEEP CONNECTION ALIVE. (you can set it to connect on demand)
Configed all 3 pcs to obtain an IP adress automatically.
Plugged them into router.
Router assinged an Ip address to each pc.
Now all i need to do is open IE on any pc & im online instantly. (cuz my router is set to a constant connection)
No need to install any software on pcs, its a direct link from your Ethernet card to the router.
ISP only sees the single connection from router.
Its much easier than it sounds.
Im currently adding my xbox to my 4th port.
