As long as you have an AMD CPU, you can not use the Software Update directly. The problem is that AMD CPUs are not supported by OS X and probably will never be.
Software Update removes any previous kernel installed and installs the new version (a stock version, a so called Vanilla which do not support AMD CPUs), also updates extensions. So some of the most valuable extensions gets replaced so making the system unbootable. Also some previously remove extensions are installed too. These extensions may be harmful, so need to be removed/blocked.
Therefore you should never use the software update derectly, without a preparation, or use a pre-patched updates. Like the one you have mentioned. Just be sure to customize it. Use a voodoo kernel. Also be sure to create a backup of extensions (use OSx86Tools).
Disabler kext is needed to disable some stock extensions which are known as not working (e.g. AppleIntelCPUPowerManagment.kext). By using the disabler kext, you no longer need to remove the harmful kexts - they are simply blocked from loading.
I CAN NOT GUARANTY THAT THESE STEPS WILL WORK FOR YOU.
I CAN NOT GUARANTY THAT THESE STEPS WILL NOT BRAKE THE SYSTEM COMPLETELY.
I DON'T HAVE AN AMD SYSTEM, SO THESE STEPS ARE ONLY APPROXIMATE.
USE IT ON YOUR OWN RISK.
So the basic procedure could look like this:
Backup all extensions and kernel (OSx86Tools)
Download and install a disabler kext
Note: the next step is only needed if installing an original Software Update!!!Download an appropriate voodoo kernel version (also may try other kernels as well), corresponding to the version of OS X you are planing to update to. Install it like this
CODE
sudo -s
cp -R /Path/to/downloaded_kernel/kernel_name /new_kernel_name
chmod -R 644 /new_kernel_name
chown -R root:wheel /new_kernel_name
Reboot with -v flag to be sure that disabler kest is running
Download ether iDenebComboUpdate or the Software Update (combo)
Depending on what was selected (iDeneb or the Software Update) next steps may differ
iDeneb>select voodoo kernel (also may select some other kernels) and other patches you may want (select as less as possible)
Software update run>select destination>install (note that there is a very big chance of failure with Software update and AMD CPUs)
iDeneb>if installed reboot with -v -f voodoo flags
Software update>if installed with/without an error at the end reboot -v -f voodoo(or any other name you have chosen for the new kernel installed in the previous step) busratio=20 maxmem=2048 noapic flags.
If system is not booting with ether flags, some restore is needed:
Boot from an install DVD
Run terminal
Type
CODE
rm -Rf /Volumes/DiskNameOSXisIntalledTo/System/Library/Extensions
rm -Rf /Volumes/DiskNameOSXisIntalledTo/System/Library/Extensions.mkext
cp -R /Volumes/DiskNameOSXisIntalledTo/Path/To/Extensions/Backup/Extensions /Volumes/DiskNameOSXisIntalledTo/System/Library
chmod -R 755 /Volumes/DiskNameOSXisIntalledTo/System/Library/Extensions
chown -R root:wheel /Volumes/DiskNameOSXisIntalledTo/System/Library/Extensions
rm - removes existing extensions folder
rm - removes existing extensions cache
cp - copies extensions from backup folder
chmod/chown - sets correct permissions
May also run repair permissions from Disk Utility.
Reboot.
Now if system is booting, most likely you will need to fix VGA and/or other drivers. Also some additional extensions may be needed. It greatly depends on the hardware.