OSX on HP Pavilion Elite

Step 1 Getting Ready
  
- Download and Burn the DVD image iAtkos v5i.
  - Download and Extract the BIOS v5.17 MOD or BIOS v5.23 MOD make sure your Motherboard model is Asus IPIBL-LB. If your PC is similar but your motherboard is Asus IPIBL-LA you can try this BIOS 5.08 MOD, this is not  a MOD bios but work perfect (Thx, igotjshoe)
  - Download and Extract Afuwin
  - Prepare your Partition or your Hard Disk to install Leopard
  
  Step 2 Modding the Bios

Here some pics:




  
  To flash the ROM Bios you have to open Afuwin make sure you are the administrator, here is the info with pics

This is what you have to do in Afuwin, make sure your not running weird programs:

IMPORTANT: Make a Backup of your BIOS

  
  Be careful about the BIOS Flashing, if you dont wanna flash the BIOS just try cpus=1 in darwin
  
  Step 3 Installing Leopard
  
  Click Here for Screenshots!

- Restart your computer and go to the BIOS
- Go to Advanced Tab, set your SATA1 Controller Mode to AHCI Mode
- Now go to the Power Tab and Enable the processor's XD Features, Saving and Exit.
- Boot into the DVD by pressing ESC key at the BIOS Prompt and the installer should load now.
- Select your Language
- Use Disk Utility from the Utilities menu. In Disk Utility, Select your Partition, and format you should choose Mac OS Extended (Journaled). After partitioning, quit Disk Utility to return to the Leopard Installer. Important: Partitioning the disk erases the entire disk, so make sure you back up your important files first.

  Step 4 - Customize (Updated 09/01/09)

iAtkos V5i Main System
Bootloader:
- PC Efi v9
X86 Patches:
- Decrypters:
--  AppleDecrypt
- SMBIOS Drivers:
-- Apple SMBIOS Enablers:
--- SMBIOS-EFI
- Disabler.kext
- OHR
- PS/2 (For these with PS2 Keyboard/Mouse)
- Remove Thermal Kexts
Drivers:
- VGA
-- NVinject
-- nVidia:
--- EFI String for nVidia:
---- 8600 GT 512MB
System:
- SATA/IDE:
-- Intel AHCI SATA

- Leopard will now install. This can take a while, so be patient.
- It will ask you to Reboot and dats it.

Step 5 Dual Boot
  
  Theres alot of forums about this, google is your friend.
  
  PPost Installation (Updated 09/01/09)

You'll need to install the driver for the Wireless
Wireless: HERE (Ralink RT73)

Fixing Audio and Sleep for OSX 10.5.6 (Updated 09/01/09)

Audio: HERE  (ALC888S)
Sleep Issue: HERE
Video: HERE (8400-8800)

How to fix unknown processor string in "About this Mac"

go to System/Library/CoreServices/Resorces/English.lproj

You will find a file "AppleSystemInfo.string" open it using TextMate and find "UnknownCPUKind" = "Unknown";
replace unknown with the type of your processor for example, Intel® Core™2 Quad. make sure you change only letters only not the special characters like =, " or ;. Save it, it will ask for your permission, enter your password and you are all set, no need to reboot.

How to change "About this Mac Graphic"

To use these you need to backup the current MacOSX.tif in /System/Library/CoreServices/loginwindow.app/Contents/Resources and then delete MacOSX.tif

Then rename the file you download to MacOSX.tif and copy it to /System/Library/CoreServices/loginwindow.app/Contents/Resources

Then fix permissions.

Logout and login then view About This Mac.

And Check HERE for lots of icons

TIPS:
About Leopard Fails Sleep when idle, some apps like Paragon NTFS or MacFuse can affect the OS, try deactivating them and thats it, this Issue even affect the MacBook Pro.

Heres a Preview: YouTube - Running Leopard on HP Pavilion Elite

Update: After Mod you can install any version, even retail version
  
  
  
  P.D: Sowwy about my English and Good Luck