Ok it looks like you have the wrong audio kexts installed prolly chose the wrong one in multibeast if you can get it to boot up we can fix this the easy way so boot up with -x -v GraphicsEnabler=Yes PCIRootUID=1 and if it boots up then journey to root/System/Library/Extensions and delete AppleHDA.kext and HDAEnabler.kext and any HDAEnabler1.kext if present then download a program called kext wizard( a quick google will pull it up) and on the maintenance tab repair disk permissions and rebuild kext cache the reboot with fingers crossed if you cannot get it to boot let me know so I can give instructions on how to fix it from outside of the OS
a fresh install is always an option I've done it many of times myself when frustrated although that is your choice to make it may be easier but you will more than likely still have some issues to work out since we are having a rough time getting it to boot up to the desktop I'd say go ahead and do what you feel is best and let me know if I can help in anyway possible you can do a reformat and fresh install using your unibeast USB drive
I can't do private message as this site is for everyone to be able to gain help from all posts its against the rules also but i may can help. With the graphics Card in try to boot with -x -v GraphicsEnabler=No IPGEnabler=No PCIRootUID=1 npci=0x2000 and see if it will boot up if not same as usually post back with a quality screen shot of where the text stops
Please get me your exact graphics info like manufacturer and model just apple ati hd 5870 isn't good enough i need to get your device id for your specific card
