I am currently running 10.5.7 Retail on an ASUS P2-5945G with everything working.

Using Chameleon 2.0 RC1 with 12 kexts.

Steps to install:

1. Downloaded and booted from iDeneb 1.4 DVD. I couldn't boot from retail DVD.
2. Formatted 3 partitions Mac OS Extended (Journaled) with GUID partition table.
3. Installed iDeneb to second partition.
4. Booted into iDeneb, installed Chameleon 2.0 RC1 on first partition..
5. Loaded kexts into /Extra/Extensions on first partition.
6. Used disc utility to restore Retail 10.5.6 DVD to 3rd partition.
7. Booted and chose to start from 3rd partition using Chameleon.
8. Installed 10.5.6 Retail on 1st partition.
9. Booted into retail (1st partition) and deleted other partitions, resizing first partition to full.
10. Downloaded and installed 10.5.7 update. Rebooted.
11. Fully functional retail install.

Bios Settings (ASUS P2-5945G)
- Advanced > CPU > Set Execute Disable Function to ENABLED
- Power > Set Suspend Mode to S3
- Power > Set ACPI 2.0 Support to YES
- Power > Set ACPI ACIP Support to ENABLED

Kext Pack:
Here is a zip of my kexts to go in /Extra/Extensions
 Kexts.zip ( 1.57MB ) Number of downloads: 428

 TimeMachineFix.zip ( 1.17MB ) Number of downloads: 105


NOTE: AppleIntegratedFrameBuffer.kext must replace the vanilla one in /System/Library/Extensions because Chameleon 2.0 RC1 can not load it. This is the only vanilla kext you will have to replace. Keep a copy in Extra/Extensions for when you upgrade.

NOTE: I do not have kexts for SATA devices

UPDATE (2009-07-08): I have added a patched IONetworkingFamily.kext for fully-functioning Time Machine. This is in TimeMachineFix.zip. Just copy to Extra/Extensions and Time Machine should work without error.

GMA 950 Fix (Intel 82945GZ Devide ID 2772 Revision 0002):
To get full resolution and hardware acceleration, use the AppleIntegratedFrameBuffer.kext from 1.5.1 with the stock 10.5.7 drivers. The trick is that if you put it in Extra/Extensions it will not be loaded by Chameleon, you must replace the one in /System/Library/Extensions for it to work. With the 10.5.7 drivers and 10.5.1 framebuffer I'm getting full support with artifacts limited to certain applications.

I tried Dr. Hurt's DSDT.aml patcher but it doesn't work with my motherboard, so after lots of searching this is the only solution I could find. You may experience some artifacts. To get a fully working graphics with no artifacts someone needs to patch GMA950 kext for device id 8086:2772. Nobody has done this that I know. I am working on it now myself and will post when I have successfully patched.

ADI AD1988b Fix:
Use the kexts in my supplied file.

ASUS P2-5945G Specs:

CPU
Intel CPU up to 3.8 GHz
(Prescott/Smithfield/Cedarmill/Presler/ Conroe)
Socket 775
1066/800/533 MHz
Chipset
North Bridge: Intel 945G
South Bridge: ICH 7
Memory
2 x DIMM
Dual DDR2 667/533/400
Support max. 2GB
Expansion Slots
2 x PCI
Graphics
Integrated Intel GMA 950 (82945GZ id2772)
IDE
1 x ATA 100
S-ATA
1 x SATA II
LAN
10/100/1000 Mbps
Audio
ADI AD1988B
Azalia 8 Channel