I can't write a perfect how-to, but I do have a running 10.6.2 on a D250:
Many tweaks can be made from here, but at this point, trackpad works, wifi works, camera works; and I need to move on to installing programs so I can send my regular Mac in for repair. Maybe I will play with tweaks (like to get multi-core support back) at a later date.
does your built in webcam works with 10.6? i tried runnign it with ym messenger it works.. but with skype it doesnt..also can i have a link to you wallpaper? thnks