Yep - you have to make sure to set your motherboard to iGUP or dedicated and set it to 64mb then do a goodle search for
"HD4000 full acceleration for 10.8 / 10.7.5" - Go to page 2 and look at #35
Make sure you install chemera 1.11.0 on your ML install drive.
You will need to do some editing of your org.chameleon.boot.plist by injecting the hex string of the graphics (this goes in the string for device-properties) you must make sure to set the resolution of the display in there as well as i was getting a messed up garbled screen when booting up until i set the display to 1920x1080 - then magic!
You can also set GraphicsEnabler to No as well
As i have a 6950 HD Radeon card as well i had to remove the ATI6000 kext as well as this caused my boot to kernel panic. But at least i dont have to take my card out everytime i want to use the Mac and hopefully Netkas will find a way to get full Anti Aliasing on the card as well.
I have popped my plist below for your info:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Kernel</key>
<string>mach_kernel</string>
<key>EthernetBuiltIn</key>
<string>Yes</string>
<key>Kernel Flags</key>
<string></string>
<key>Boot Graphics</key>
<string>Yes</string>
<key>Quiet Boot</key>
<string>No</string>
<key>Timeout</key>
<string>5</string>
<key>GraphicsEnabler</key>
<string>No</string>
<key>Graphics Mode</key>
<string>1920x1080x32</string>
<key>device-properties</key>
<string>8800000001000000010000007c0000000200000002010c00d041030a000000000101060000027fff0400100000006d006f00640065006c0000001a000000496e74656c20484420477261706869637320343030302c0000004100410050004c002c00690067002d0070006c006100740066006f0072006d002d006900640000000800000005006201</string>
<key>UseKernelCache</key>
<string>No</string>
<key>PCIRootUID</key>
<string>1</string>
</dict>
</plist>
Hope this helps you like it helped me