Hi...
You can still let AR use the path /usr/ar/.... but still locate the files somewhere else.
If I want to have the AR-installation in its own filesystem I just create a symbolic link from /usr/ar to where I have installed or want to have AR installed. Then AR will happily think it is still located below /usr/ar in the file-systems.
Since there exist symbolic links on unix, I haven't played around to confirm if it is possible to relocate AR on a different path and make AR aware of it.
Sub-parts of the AR-installation, like a plugin-server and all it needs, I have successfully placed somewhere else. And the plugin-server is also aware of a different path and is still working happily as it should.
In this case there have been a need to relocate the plugin-server, because multiple plugin-servers was going to be started/run on the same machine.
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Quick