You will need Commands.txt & DataRefs.txt from your X-Plane plugins folder (get the demo from x-plane.com if you need the most recent version of those files).
The plugin should be here:
http://www.xsquawkbox.net/scenery/tools.php
You specify the animation ranges from the x-plane properties (select the rotation or translation object first). simply choose a dataref, define which dataref range corresponds to which object translation and you get the slider to control it.
peter