Probably you need the Web Based System Manager...
I searched the way it handles the mirroring, but that's still something that isn't really well depicted there... But there are A LOT of other features..
things you need:
- http server on your aix box
- wsm_remote bundle installed
if all that is ok --> you go on your remote box to the website:
http://aix_box/remote_client.html
there you can download the setup of the Remote Client for windows or Unix.
It's a really handy tool.
grtz