Here are the drivers I used to make my XPS M1210 works almost perfectly on Leopard 10.5.5:
http://www.filesavr.com/xpsm1210drivers

I included a readme file that explain the content of each folder.
I want to add that the combo update only worked using the Pre and Post update patches.

I still having mouse tearing/artifacts and the internal Wireless and Sound card still non functional.

Computer (laptop): XPS M1210
Bios: Phoenix ROM BIOS PLUS version 1.101 A04
Memory: 1014mbRAM | Procesor: Intel® Core™2 CPU T5600 1.83GHz
Video: Mobile Intel® 945GM Express Chipset Family
V-Memory: 224mb
Sound: SigmaTel Audio
Network: Intel® PRO/Wireless 3945AGB Network Connection

Sound: online and working 100% (with audio-usb adapter "C-Media USB Headphone set")
Wireless: Online (external usb adapter)
iATKOSv2 Leopard: running at 99.9%