Its easy to be lost somewhere in the middle, feel free to ask questions via After this restore Installation File to your USB with Disk Utility. You can Clean Install OS X Lion 10.7.2 or update Snow Leopard Go to DSDT database and Download DSDT corresponding to your motherboard.
Mac OS X Lion 10.7.2 offline installer complete setup for mac OS with direct link. Mac OS X Lion 10.7.2 dmg for mac free download full version.