The router its self is .1, though I have DHCP set to start at .1. I assume the router is smart enough not to lease that address out to another computer, right?

The subnet mask is .224. I can't remember why I set it that way. I think it was because the incoming internet connection (which is static IP), has a .224 subnet mask, but it's not a requirement that they match, is it?

I probably should install DD-WRT, but the network is under pretty heavy use right now (about 25 users, a few servers, and a bunch of printers - hence the issues I'm having). Plus, DD-WRT is seriously annoying to install on the latest 54Gs. Have you tried recently? A couple years ago it was a simple matter of using the built-in firmware upgrade process, and now you have to log in via SFTP, run something at the command level, then install the new firmware over the same. It's doable, but these routers are part of my inventory, and I don't want to screw one up and be out $45.

*edit*
ps- heavy use is the wrong phrase. There's a lot of users, but it's all web surfing and emails. This is technically a school network, but it's all offices, a newsroom, and a computer lab. I think the WRT54G will do fine...