Hell, I'm currently using AG_UnitFrames. But when I'm in a raid I would like the raid frames to atleast fade into red, so I can't see what members who are out of range. (I'm a healer). I couldn't find any option which allowed me to do so. Therefor I turn to you guyse for help :-)
You cannot configure the standard range check plugin.
A friend and I have heavily modified that plugin to include configuration via Blizzards built-in AddOn setup tab (accessed via the Interface options). I've attached it to this post if you're interested in using it. Keep in mind it is not compatible with the other plugin and you must disable or remove it.