I have written a tool to auto-patch cpuids and auto-decrypt system binaries on Mountain Lion and Lion.
It is based on AutoAPBDecrypt but uses a launcher to elevate itself to admin rights.
This way it can directly patch and replace the system binaries.
Pre-built binaries for Mountain Lion and Lion are built.
Source is, as usual, also included in the zip package.
Make sure you do a Time Machine backup just to be safe.