I'm not much of a networking guy, in fact, I know very little. But I'd appreciate any help and insight any of you could offer to me about my situation.

In my apartment, I am using a D-Link DI-624 Wireless Router with a Seimens SpeedStream DSL modem. All of the laptops receive a pretty good signal from the router - the apartment below receives good signal as well. However, the apartment adjacent to ours (we have a very long apartment building) does not receive a good signal at all. I've attempted to move the router as close to their apartment as possible and I've received lackluster results. The apartment is one floor down from ours, so the wireless signal must travel diagonally through floors and multiple walls.

I do have a second D-Link router. I'm wondering if I can either wirelessly or used a Cat 5 cable to tie the second router into the first router and distribute the signal to the other apartment. How do I go about doing this? The second router is a DLink DI524.