Just a thought.
You want to install OO as root and run OO as user, correct? You just have to log in as user, open terminal,
chown $userid$ /usr/local/oo ($userid$ is your username)
chgrp users /usr/local/oo
chmod 775 /usr/local/oo
Install oo there. If it doesn't save, then
Add yourself to users group
chmod -R 775 /usr/local/oo