I think that for the immediate future I will stick with the WRT54GL routers until they quit working, but I will connect the two routers by Ethernet through a hole in the floor/ceiling rather than wireless. Both of them have been working perfectly for the last week or so, so perhaps they will continue.

What configuration changes will be necessary for the second router, which is currently running as a repeater with DD-WRT, receiving a wireless signal from the primary router and then rebroadcasting it?

tanstaafl.