try this
https://www.dropbox.com/sh/nt7e20admnivqux/BjxSdyCkNr

i give two option.
Option 1 : Using Applehda and legacyhda. copy both of these files into /System/Library/Extension and repair cache and permission

Option 2: Using VoodooHda (PLEASE REMOVE Applehda and legacyhda. first if you want to use this.

If still not working, you may want to create you own dsdt. use the tutorial from first page.
cheers! :)

by accident i suppose ;)

for the audio use the advice above my post
as for the trackpad i own a K50 and have an elantech touchpad too but dont really know why its not working

Thank you for your advise.
Once I used VoodooHDA but there were noises as if you're listening to a radio at a wrong frequency. Also I tried the 44100Hz and 48000Hz in Audio MIDI Setup.
I've always been using my own dsdt, and fixed a lot of problems with dsdt. A few days ago I got it patched by iDsdt with my own codec file. That's how I got my earphone right with HDAEnabler.kext and modified AppleHDA.kext. However the AppleHDA was downloaded from the Internet so I don't know how should I modify AppleHDA to make the built-in speaker working.

The only thing I can do is to use ApplePS2Controller.kext to get it working as a mouse. But it's really a disappointing thing that I cannot get it working as a trackpad and scroll horizonally.

The most annoying thing is iCloud and iMessage. I cannot sign in into iCloud. What about you?
Someone say Chamelon may fix this. But I've always been using BootThink and I love the style of BootThink. However BootThink developement has stopped and nowhere can I find the author nor the source code.

One more thing is the display. Now I'm using 10.8.2 and my laptop display is recognized as a desktop display.
Attachment 1724
Besides, I cannot adjust the brightness of it. I tried EDID and it didn't work.
How can I get it recognized as a Laptop Display like in the picture?
Attachment 1726

iCloud, audio, trackpad and brightness are the only four problems on my way to perfect hackintonish.

oh man. i'm sorry. i forgot to adrres that noise problem. it is easy to solve.

first - install/copy VoodooHDA.prefPane to Library/PreferencePanes
second - install/copy VoodooHdaSettingsLoader
third - open system preference panel. at the bottom you will see vodoohda panel. go inside there, and tick "Enable SSE2". (You may also want to set Input Gain to zero in the Micropohone side to remove audio loop"

For AppleHDA you may want to edit IOPCIPrimaryMatch and LayoutID to match you system. that was how i do it last time when i'm trying to use applehda. but i think, the Applehda kext which given in the zip on first page is good enough(same with the file i gave last time)

Files needed attached . Have a try! :)

about iCloud and iMessage. sorry . i don't use it. so don't really know. maybe flip360 know about it. about the brightness. can't you use the FN + F5/F6 to adjust the brightness? or whatever button it is. i use that to adjust the brightness.

Thanks again for your advice.
I just tried VoodooHDA.kext and it recognized no audio device. So strange. I've always been using VoodooHDA until 10.7.1.
The Fn key currently only works with F7 and F8.
Fn+F7 for turning on/off internal display and F8 for kp.
Today I modified a lot on my dsdt and made my LCD built-in and recognized as a laptop display. But, I still cannot change the brightness.
This one is my screenshot.
Attachment 1728
and this one is from Internet.
Attachment 1729
There's no option for adjust brightness at all.
Besides, if I tried to adjust brightness under Mac, when I reboot to BIOS, screen would change to the most bright state.

Alright, you may want to try to install voodoohda using the latest voodoohda installer. Then replace the kext with that I gave. :)

Why dont you use the software thats in the tutorial for 10.6.x on the first page? works here on 10.8, i use it for the audio buttons ;)