First, thanks for the guide. For weeks I've fought ml and lion (above 10.7.2) to work properly. My main issue, the screen shuts off just after "pci configuration begin". the last time i tried this, i asked on tonycrapx86 and they told me i needed a "dual link patch". i tried to follow their "tutorial" on how to use this patch, but none of the variables they wanted me to find were in my dsdt. So i gave up until I found this guide. I actually got to see the installer this time, however now that it is installed and ready to go, it will not stop turning the screen off. I've tried both dsdt's I've found in this post, as well as setting my graphics mode to 1280x800x32 (as that's my native res) and the screen still shuts off. I remember when i installed snow leo that it required me to use NVEnabler and not Graphics Enabler, but i haven't seen either work with ml.
System Specs:
Dell Latitude E6410
Intel Core i5 560m @ 2.67ghz
NVIDIA® NVS 3100M (512MB gDDR3)
14.1" WXGA Anti-Glare LED Display (1280x800)
8gb ddr3 ram (2x4gb)
320gb WD Scorpio Blue hdd (mountain lion)
160gb WD Scorpio Blue hdd (modular bay, snow leopard 10.6.8)
Broadcom BCM4311KFBG (addon card from old laptop in wwan card slot)
Intel® Centrino Advanced-N 6200
Dell Wireless 3755 Bluetooth® 3.0