...not really an answer, but I'm running Woody on such a machine (originally PB180 but replaced the daughtercard by a 240 one) and I could only get it boot from BootX. It is a bit slower but it works, so if you have enough space to keep a minimal MacOS on your HD, that might be a way out.
"dmesg | more" will work if you get your linux booted. If you find yourself back in the installer every time you boot, you should try "alt-F1" or "alt-F2" to get to a free terminal where you can issue basic commands. Another suggestion: try different kernels. I only got it boot almost properly with 2.2. Only my Asante Fast ethernet card was not working. I had no problem with the ethernet card when booting 2.4.something, but I could not get graphic interfaces working properly (XFree86 and desktops). I hope it helps Drazen