Alias /rrdui/ /home/joe/rrdui/html/
ScriptAlias /rrduiback /home/joe/rrdui/tools/rrdui-cgi.py

<Location "/rrduiback">
    SetEnv CONFDIR "/home/joe/rd-test/conf"
    SetEnv WORKDIR "/home/joe/rd-test/work"
</Location>