Late 2009 Mac Mini EFI 2.1 Firmware update not needed/already factory installed?

Here has been my issue of trying to figure out if Mac Mini can handle (and fully use) 8GB of RAM with my current EFI version.

I want to upgrade to 8GB on a LATE 2009 Mac Mini that currently has Boot ROM MM31.00AD.B00 and was told to update with EFI Firmware update 2.1 but it does not install saying "This update is not needed on this machine".

I found various contradicting posts saying that I need my Boot ROM to be MM31.0081.B06 or my machine won't utilize the 8GB fully

and will slow down in performance and/or crash after the Apple recommended 4GB.

But here's what I found interesting. Some users have mentioned that the Late 2009 Mac Mini's shipped with updated firmware and don't need this update but could not find a concrete answer as to yes it did ship with it or not.

Apple doesn't even list a Late 2009 Mac Mini as needing a Firmware update in this list of Firmware updates: http://support.apple.com/kb/HT1237 . Should I just assume that my machine shipped with said update and is capeable of the 8GB? I use this for Logic Pro 9 as a somewhat portable workstation that I can take with me so maxing out the RAM would be ideal for me.

Any help or clarification would be greatly apprishiated,

Nelson