Well first the 10.5.8 Update for AMD:
1. Make sure to have Disabler.kext beeing installed and loaded. ("kextstat | grep Disabler" should display if beeing loaded or not).
If this Kext is not present on your setup do not continue!
2. You need to back-up your current Kernel and Kernel Extensions, on Terminal:
Code:
sudo -s
# Enter your password
cp /mach_kernel /bak_kernel
cp -R /System/Library/Extensions /Extensions_bak
3. Optional, but recommended: Get latest fakesmc release from here:
http://netkas.org/?p=338 - install the Leopard Version via KextHelper and delete either dsmos.kext or AppleDecrypt.kext (depending on which one you are using) from /System/Library/Extensions before you reboot. On next boot up use the "-f" bootflag.
4. Download the 10.5.8 Update manualy:
http://www.apple.com/downloads/macos...058update.html
5. Get the OSx86 Tools and keep them open - apply the Update but do not reboot - Go to the OSx86 Tools, check the following boxes: repair permissions, Set kext permissions & Clear extensions cache and execute those tasks - might take a while. Then reboot your system.
6. Try to boot OS X using "/bak_kernel -v" on the Bootprompt.
7. After hopefuly a succefull boot reinstall your old system.kext and seatbelt.kext from /Extensions_bak folder using KextHelper and use the follwing Syntax to make your patched Kernel the default one again:
Code:
sudo -s
rm -f /mach_kernel
mv /bak_kernel /mach_kernel
...
For the Audio you can try to install the VoodooHDA or Azalia pkg from your DVD - open the packages folder using "open /Volumes/iAT*/System/Installation/Packages" on Terminal, when the DVD is inserted. But keep in mind to remove the Kernel Extension again if it doesn't work, try to avoid to have more than one fix for the same purpose at the same time!