What you need to do now:
1.Open Multibeast and select:
-System Utilities(this repairs permissions when you install/uninstall/modify kexts)
-Drivers&Bootloaders/Kext&Enablers/Miscellaneous/FakeSMC Plugins
-OSX86 Software
After intalling all this,go to /Extra/Extensions folder and remove NullCpu"...".kext(keep a copy on desktop,just in case).After removing the kext,open KextUtlility in Applications,enter pass and wait till it completes(it does the same thing as System Utilities in MultiBeast,but you can use Kext Utlility to install additional kexts you may need,for example a WiFi Usb Adapter;all you have to do is to drag the kext you download on KextUtility and it will auto install it and then repair permissions).
Ok,so now you removed NullCpu"...".kext from Extra/Extensions folder and you repaired permissions with KextUtlility.
Now,go here
http://www.islayer.com/apps/istatpro/download/ ,install it and restart.
Once booted up again,press F12 and you will see the temps of you're HDD,Cpu,MB...
After you have done all this,to go further with you're system optimization,return to Extra/Extensions folder and delete all kexts you don't need.My guess is that you only need FakeSMC and the 3 FakeSMC plugins you just installed(ACPIMonitor,IntelCPU Monitor,SuperIOFamily).After you deleted the kexts,remember to
ALWAYS run KextUtility to repair permissions!