Can not boot up system after using Zephyroth Updater to 10.5.5

[Milesy303]

I am using Leo4All 3 distro, and was advised by someone to use the Zephyroth Updater to get my system to 10.5.5

Everything was working fine until I done this update, now it stops booting at

IOKitWaitQuiet() timed out waiting to write kernel symbols

AppleNForceATA: found 0 units.

This is not the same as the "waiting for root device" I have experienced in the past and have solved by copying the ATA kexts to the Extensions. That is done but no joy.

I am using a

Asus M2N-MX SE Plus board
Athlon 64 cpu

Is there a specific kext I need to rip out, replace or add to fix this?

thanks very much

Chris