I have a netgear router. I have also configured a dhcp network for my home using it.
So my configuration in repeater mode of the buffallo router is DHCP. Further you need to provide ssid and password for the repeater to connect to.
Configurations are same as your laptop. DHCP settings, ssid selection (ie your network name from list) and password as just about the settings required.
Repeater mode follow WDS protocol. It is independent of the devices used.
Having said that, I have used internet for firmware upgrade and to access very limited contents. Not worth the time, money and effort in trying to bring the TV online. Contents are very scarce.
If you want to add your TV to your existing network with WDTV live or NAS and such, its worthwhile but just for connecting the TV to the net, you should pass.
Thanks for the info. Not at all for watching web content on the TV, trying to network so that i can watch movies stored on my hard drive.