I installed and tried the airport extreme 802.11n enabler on my MBP but found that the connection breaks frequently, now I'm looking for a method to UNINSTALL the enabler, is it possible?
First find "IO80211Family.kext", which is located in Macintosh HD/System/Library/Extensions/
Right click on in, and click "show package contents"
In the window that comes up go to "contents/plugins/
In the plugins folder there should be a number of .kext files
Delete "AirPortEnabler.kext"
Restart
And then re-install "AirPort Extreme Update 2007-002"
Found here http://wsidecar.apple.com/cgi-bin/nph-reg3rdpty2.pl/product=13259&cat=59&platform=osx&method=sa/AirPortExtremeUpdate2007002.dmg
And that should be it
I hope this helps