My Asus X501a model has an Intel B930 CPU (2x2.4 GHz), 2 GB RAM, and 320 GB HDD, video is Intel HD (without number).
Managed to install using Niresh 10.8, and installed ALL the kexts found here (10.6 and 10.8 zip for asusx501).
Sorry I don't know how to burn chameleon+iatkos on the SAME USB stick, because the dual stick method described above always gives me "Can't find mach_kernel" errors when I tried to boot the installer.
Anyway, after install (selecting Graphics Enabler and UUID only under custom options) + all kexts droppend into kext wizard + fix permissions and a reboot I got the following results:
Weird thing - during niresh install the laptop's keyboard and touchpad worked OOB - after install no keyboard+ touchpad!
I downloaded ElanTouchpad_ML_V1.7_Final_V3_Only.zip kext! However it enabled the keyboard only.
What does not work: touchpad, wifi, bluetooth, built in memory card reader (a Realtek PCIE one).
Graphics works using: "Graphics Mode"="1366x768x32", screensaver works, menus are slightly transparent, I can move the chess figures but Safari new tab flickers like hell.
BIOS settings: After playing with the amount of RAM separated for the Intel HD Graphics I stick to the lowest setting 32 MB. There is no difference in video performance if I give it the highest, 512 MB RAM.
Microphone not tested, sound is ok.
I will experiment more, maybe a reinstall next week.
Wifi tethering through USB works with an Android phone, just install HoRNDISrel4.pkg and plug in your phone with an USB cable.