ASUS R9 290 (non-X) not working in Yosemite

I've done quite a bit of research over getting the R9 290 to work in OS X 10.10.2 and have had no luck finding anything, at least that I can understand. I am new to building Hackintoshes and have installed OS X 10.10.2 on my PC using Unibeast and then Ran Multibeast but I have horrible graphics performance. I had to use the bootflag GraphicsEnabler=Yes to install and to boot. Any way to get the card working in OS X 10.10.2? I heard something about editing kext files, but I have no idea what those are. Please be very specific and explain what any terms mean, I am VERY NEW to Hackintoshing. Thanks, any help is appreciated

My Specs:
ASUS P8Z77-V PRO
i5-3570k 3.40Ghz
8GB Corsair Vengeance
Corsair CX750M
ASUS R9 290 w/DirectCU Cooling
Samsung 840 Series 120GB (using for OS X)
Samsung 840 EVO 250GB (Windows 7)
Seagate Barracuda 1TB (for storage)
LG DVD Burner
ASUS VS247 Monitor (1920x1080) (Connected with HDMI, if that matters)

im in the EXACT same position as you. could you tell me if you did finally?