I literally just had a major struggle converting a WRT54GL to OpenWrt.
- What version of OpenWrt did you flash to this router?
You likely ran out of memory and flash space.
- What version of the WRT54G do you have?
- Look here: https://en.wikipedia.org/wiki/Linksys_WRT54G_series
- or provide the first 4 charactars of the serial number