Great software, used it on my old WRT54GS
Dont use that anymore (well I have, as an emergency wireless bridge when some wiring went out), but its good stuff.
That’s exactly what I used an old WRT54G router for... With dd-wrt I have a bridge upstairs and didn’t need to run CAT5 cable. I’ve been running it this way for a couple years. Every month or so I reboot it, and it stays up and running quickly.