[A//// Guy]

On the belkin you would want to set it up as a Wireless access point and not a router, since you have the Actiontec already handing out DHCP addresses.

What you want to set up to repeat signal is a wireless bridge, see if the settings even allow that in there and test that.

Those adapters are interesting, I havent seen those. In all honesty, if you can run a couple Cat5e lines through your ducting or through an unfinished wall or basement ceiling room, I would do that. Then you can put another WAP upstairs with the same name and have great signal and speed. Im really surprised you didnt put a few ethernet outlets around the house when you built the house, since that would have been pretty easy to do even yourself.