router help

[gilana]

I just bought a wireless router, so that my boyfriend can play networked games on his Nintendo DS and I can get better quality on streaming Netflix on my iPhone.  I already have a wired router in place for our cable modem in the living room, and I had hoped to daisy chain this one on in my bedroom, since I'm not sure the signal would be strong enough from the living room.  Turns out that you can't just plug it in with the default settings and have that work, though, and I don't know enough about networking to make sense of the solutions I'm finding online.  Anyone out there willing to help walk me through it?  Thanks!