I never wrote that applications can't be updated when they are stored in a non standard location.
I wrote that iWork applications, when delivered as a single package, must be stored together in a given folder for such process.
At this time they weren't delivered as single separated apps but as a package.
In fact this feature apply only to iWork '09.
It's because for this package, updaters applied to the three embedded applications.
Only the late update was a Keynote only one.
For iWork '08, there were separated updaters for each applications so, installing them out of their original folder wasn't a problem.
The fact that you forget to copy the resources when you wanr to work from an other system is not an Apple problem, it's yours.
I repeat that you were wrong and that you didn't understood what you were writing about, because the shared folder, the one which must be copied, is not the one which you described with :
upon first run, the app creates its folder in Application Support if need be.
The shared folder:
Macintosh HD:Library:Application Support:iWork '09:
or
Macintosh HD:Library:Application Support:iWork '09:
is not created at application's first launch, it's created by the installer during the installation process.
The one which you described is :
Macintosh HD:Users:<userAccount>:Library:Application Support:iWork:
For someone understanding the way iWork is installed, the copy process is perfectly neat and clear.
It is more efficient than installing then apply the required updates which, to be up to date require :
install iWork
apply iWork update9.1
apply keynote update 5.1.1
Yvan KOENIG (VALLAURIS, France) mercredi 11 avril 2012
iMac 21”5, i7, 2.8 GHz, 12 Gbytes, 1 Tbytes, mac OS X 10.6.8 and 10.7.3
My Box account is : http://www.box.com/s/00qnssoyeq2xvc22ra4k