I was trying to send satallite internet from one house to another about 300ft. away. ok, here is what I did and what happened. I used three linksys wrt-54g routers. At the house with the internet connection, set the send and recieve antenna to one side and turned up the transmit power to 100mw. I ran RG8 coax to a directional antenna on the side of the house. I used a directional antenna on the side of the other house that plugs into a wrt-54g with RG8 coax. This router has DHCP turned off and has the same network and security settings as the first router. The transmit and recieve antenna is set to one side. Next I ran an ethernet cable to the living room that plugs into another wrt-54g(this is where I am running into problems.) I can connect to the internet on my laptop through the second router via ethernet cable but I cannot connect on their computer in the living room. I have tried it with the ethernet cable plugged directly in to the computer and through the third router. I also checked my cable and it is good. Their computer has windows 2000 and was previously on a network but I changed tcip to obtain an ip automatically. What could possibly be the problem. I have tried for hours.

3rd router - plugged in at the wan port?

If so thats your issue. use crossover from 2nd router lan port to 3rd router lan port. Turn dhcp off router 3.

Give a person a fish, they eat for a day. Suggest they internet search and they learn a skill for a lifetime.

Sounds illegal...I don't care...go nuts I'd help if I knew anything about wireless networking, that's why I'm here.

Nothing illegal about it as long as the person paying the internet bill is OK with it.

Give a person a fish, they eat for a day. Suggest they internet search and they learn a skill for a lifetime.

I don't know how long your RG-8 cables are. But just because they are big does not reduce the amount of signal loss. For best results the directional antennas should be connected with a minimum amount of coax.

Can you detect the signal at your neigbours,try using some wardriving(sniffing) tools
Have you tried turning DHCP on (your neighbours)?
Can you ping to other computers ?
Can you setup a network ?
Try calling Linksys.