Audio help ALC888

Hi, Im really sry if i posted this in the wrong area, but ive been trying to find the correct place for 20 minutes, so…

I've used tony mac's retail dvd installation and its 99% working. I have gotten my graphics card to work fine and I have over 100 applications installed. The only problem I have is that I cannot get my audio to work. I've tried the voodoo kext but when I install it and install prefpane, it says cannot find registry-entry path. I've tried the steps on Tony Mac's guide but nothing works. When I got to about this mac, it says - intel High Definition Audio:

Device ID: 0x1458A002
Audio ID: 887
Available Devices:

I had the jacks and sizes earlier, but when i was trying to use voodoo instead of Applehda, it changed it. I re-installed applehda and this is all i get. None of my devices are recognized.

Can anyone here give me a DETAILED WAY TO GET AUDIO? Do my speakers need to be usb? Do I need to do anything in Bios for sound? Do i need a sound card?

Any help wound be great. Oh, and this is a custom built comp.

Core i5
GA-P55A-UD3
Nividia GeForce 9500 1gb
4gb DDR3