Here is the simple instruction to follow for updating your hackintosh from 10.5.4 to 10.5.5 All you need is to install IntelCPUPMDisabler.kext for installing kext use OSX86 tool from PCWIZ.
1. Download and install IntelCPUPMDisabler.kext - here. - (Restart your computer after Installation)
2. Download 10.5.5 Update - here.
3. Open you terminal and type: sudo -s
4. Enter your password and hit enter
5. Type: while sleep 1; do rm -rf /System/Library/Extensions/AppleIntelCPUPowerManagement.kext; done (hit Enter)
6. Double click on 10.5.5 Update to initiate install. Follow through with installation. NOTE: When update installed you will be prompted to ‘Restart’. DO NOT …

Updating the Hack-i-ntosh is a very panic process for newbies so it is advised to make the backup of existing system before updating.This guide is for Non vanila or hacked kernel & INTEL based system only.
You can also use this guide for updating 10.5.4 to 10.5.5
Upgrade your hackintosh to 10.5.6 you need following stuff.
Download Universal OSX86 Installer Click here and install PC EFI-V9
Download & install osx86tools from PCWIZ.
Download 10.5.6 Combo Update from here. For 10.5.1 to 10.5.4
or
Download 10.5.6  Update from here. For 10.5.5 only
Ready with Your Poison.
Here is the First Phase. Open the terminal & …