Reinstalling software on later firmware

I currently have snow leopard 10.6.8 and have installed all the latest software AND FIRMWARE. Would I be able to revert back to snow leopard 10.6.7? (will there be any problems with the already installed firmware designed for 10.6.8)

Great. Has anybody tried this without success? (or know if it will work?)
I have, with an iMac running the latest firmware. It worked.
You will need your original system install disk which is almost certainly OS X 10.6.7 or earlier.
If the drivers on the DVD conflict with the firmware on your MBP the installation will simply not proceed. It will stop and repetitive beeps from the speakers will sound until you restart the computer.
Nothing can be harmed by trying it.

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