I asked about using a pc almost as a "router" and although it's a solution, I tought about just buying a second router to act as a "bridge" between my connection. (Reason: I don't want to have to keep my laptop turned on just to use the other devices)
Here is my setup now: in room1 I have router1. In room3 I have a laptop with a wireless connection, getting an ip by DHCP.
I want to buy another router(router2), put in room3, and connect two devices using ethernet cable(my tv and my ps3): this router2 should act just a a signal repeater (don't know if this is the correct term). All the devices connecting by ethernet cable should receive an ip from router1 dhcp, not from router2(since it's doing just a "bridge" from the other router).
My router1 is a Dlink DIR-300. Is it possible to create this setup I'm thinking of?