Lion 10.7.3 update from 10.7.0 is pretty straight forward. For the Sandy Bridge laptop, all we need is to re-install Network kexts and remove the AppleHDA.kext, reboot the computer then re-install Voodoo 2.7.3 using Multibeast 4.2.1. NO NEED to re-install Multibeast 4.2.1