The instructions there describe pretty much what I was doing, but it doesn't work. Actually, I had to do things a little more manually than that. I don't know if it's because I'm using Windows, but I wasn't given the option of letting the main WDS station search for the remote. I had to enter the MAC manually, and now both routers claim that WDS isn't working because they can't find another WDS device, even though I've specified the MAC addresses. I'm pretty sure I chose the correct MAC, too, the one that says "Airport" and not "Ethernet" on the bottom of the units.

I think those instructions are a little old, and of course for the Mac. I don't know how or if they'd differ for the PC, but I know that the options in general look very different.


*edit*
Oops. Once again, I feel like an idiot. Looks like the password on one of the two airports was just slightly different. It's working now. I would have liked that automatic scan, though

Now I'll just have to see if the throughput is enough for me to live with the diminished wireless speed from the WDS...

**edit 2**
Yup, it is. I might lose a little speed overall, but with the powerline adapters I was getting about 1.25MBps, and with the WDS setup, I'm getting about 2.1MBps. I'm happy with that.