oh SNAP!!! so I got a retail copy of snow leopard working on the dx58so with chameleon and efi boot!
I followed this tutorial yesterday and now have my system running smoothly with snow leopard. I followed this tutorial
http://www.insanelymac.com/forum/index.php?showtopic=185097you need 2 drives to accomplish this but I can say it works! just replace the appropriate kext and you will have sound, ethernet, and video card working, to get video card fully working you must use osx86tools to add an efi string for your video card. My system
Intel DX58SO Motherboard
Core i7 920 CPU
EVGA Nvidia 9800 GT
OCZ 1333MHZ RAM
In order to get everything to boot I had to set everything up in bios right, I set number of cpu's to 1 and disabled hyperthreading as well as switching from sata to ahci. After everything installed correctly I turned back on hyperthreading and cpu cores to all and everything still worked great! I even was able to update to 10.6.1 through updater and everything still works perfectly.
If you were having as much trouble as me getting this mobo working with snow leopard, then you are stoked now, this is a very easy to follow tutorial that is pretty much completely automated, I dont know much of anything about efi and dsdt and all that other mumbo jumbo and I was able to use this tutorial and get it all working. I hope this helps many more DX58SO users out there since it is a very superior mobo.