This sounds like what I'm trying to do at my place. I have 2 DIR-655's. One is my main router I've had for a couple of yrs. now - used for both wired connections to xbox, WDTV, Sony Blu-Ray, and wireless connections to 3 desktops, 1 laptop, 2 ipods, etc. Most of the house is well covered and signal strength is fine. But there are a couple of dead zones that I need to do something about, especially since one is in the room where my main computer is located ( I generally get only 2 of 5 bars, and sometimes lose connection).
I just bought a 2nd DIR-655 and want to use it to provide better wireless signal in the dead zones. As I understand it, the 655 can't be used as a repeater, but it can be used as a bridge to create a wireless access point (althouhg I guess not "officially" as per Dlink).
If I interpret the description in the previous posts, I gather that I can use the 2nd 655 to create an access point by conecting it to the main 655 by hardwire, and adjusting the settings as described in Mackerel's post here.
What is not clear is how the hardwiring is to be done - do I connect to LAN port of 655 #1, and to WAN port of 655 #2?
How do I go into the 655 #2 admin. page to turn off DHCP, etc? Can I use same wireless channel for both 655's? I'm using channel 11 now on 655 #1.