IOReg dumps work fine with rev 3.0.2, I can open it here no problem.
Anyway, here's a DarwinDumper ioreg report for you.
IORegistry.zip 1.83MB 5 downloads
EDIT: if what you want is to load the MCHC driver then you don't need to inject any property. An empty device called MCHC with zero address will do, I posted an example before.