Mac OS X Leopard for AMD and Intel v10.5.1

Insert Leopard DVD, and make sure to select booting from DVD. The installer will load(it will take a while, be patient). If you have Tiger installed, don’t format the partition, just install it over the Tiger partition. Otherwise, same approach as Tiger installation, use Disk Utility to setup the partition.

Important: Use Customize… button and unselect all packages there. Then proceed to installation. When it’s done, reboot. And make sure that your USB/Pen Drive is connected to your PC.

Patch Leopard Installation

After the reboot, also make sure you do the same step above: Press whatever key combination to give you the option to choose your boot device: Now Select your CD/DVD drive.

Once the setup is loaded(again, long wait, be patient), select your language. When the welcome screens shows up, select UTILITIES-TERMINAL. The terminal will now open. We will now browse to our Thumb Drive;

In the command line, type:

cd /Volumes/123/files

Lets now run the script. This will patch the installation so it will boot properly:

./9a581PostPatch.sh

Let it run. You can answer yes when removing the ACPUPowerManagement.kext

Reboot.
The Bootfix patch

After reboot, if the system boots into Leopard fine, ignore this part and head to next section to setup multi boot. Otherwise, you might encounter blinking cursor or “HFS+ Error”, follow the steps below then

If you install Leopard without Tiger first, the system might still boot into Windows instead or leave a system unbootable at all. Even the tboot loader trick(see below) wouldn’t work. In this case, you need to repair the installation and setup boot property for it.

Code:
1. Reboot using the Leopard DVD, make sure the USB pen drive is connected.
2. Open a terminal after everything finally loads.
3. Find out what disk your leopard was installed on by issuing this command (my machine was rdisk0s2, will use rdiskXsY below, substitute accordingly)

diskutil list

4. Active the partition

fdisk -e /dev/rdiskX
fdisk: 0>update
fdisk:*0> f Y
“Partition 2 marked active”
fdisk:*0> w
Device could not be accessed exclusively.
A reboot will be needed for changes to take effect. OK? [n]y
Writing MBR at offset 0.
fdisk: 0> q

5.

Now goto bootfix directory by typing:

cd /Volumes/123/files/bootfix

and do the following

./dd if=/usr/standalone/i386/boot1h of=/dev/rdiskXsY bs=512 count=1
umount /Volumes/Leopard
./startupfiletool -v /dev/rdiskXsY /usr/standalone/i386/boot
./bless -device /dev/diskXsY -setBoot -verbose

Link
http://www.megaupload.com/?f=TMOC5U4C