Something really strange happened to me today ... A friend of mine has an acer laptop with Broadcom wireless lan, so I wanted to change my Intel 3945 A/B/G with his one to get support on my OSX 10.5.5. When I inserted the Broadcom into my laptop it complained of unsupported wireless lan and that i had to remove it and restart, so I did... and VOILA there was no kernel panic anymore (btw. i removed bluetooth and wlan support in the BIOS). So I hope this helps to all with same laptops... Others with unsupported wlan cards and same problem might try to remove the wlan hardware and try to boot... Edit: Well I think I celebrated too soon. While my os loads everytime into the GUI it still freezes when the CPU reaches 100%.