Tried to Change System Number from 3,1 now wont boot

[integra00gsr]

I went to change my system number and now I get this error message upon boot. Is there any way to revert back?

 

[P1LGRIM]

The KP is because you used a MacPro5,1 system definition but neglected to delete the AppleTyMCEDriver.kext.

Boot in Safe Mode and either change your system definition to one that doesn't use ECC RAM or,
In Finder navigate to /System/Library/Extensions/ and move AppleTyMCEDriver.kext to the Trash or,
Use the Clover patch for ECC RAM.
Restart and boot without caches.