constrain controller

well guys I have a question.... I was browsing through some of the sample files you get when you install max. One of them is the cabinet that has the lever. When you rotate the lever, the cabinet opens up. Furthermore, its a two piece door on the cabinet that reacts properly (folds in the middle). And it only opens 'so far' regardless of how much you rotate the level which is sensible. I thought 'wow, this is cool'.

I'd love to set something like this up for my Discovery model. Specifically, to the pod bay doors, so that when you grab one of the doors, the upper one say, and rotate it up, it:

A) only rotates up so far, ie like 14 degrees (on the local axis) or so and
B) he opposing door would rotate down automatically as a reaction to the uppder door.


I've already constrained what axis rotate in the hierachies tab. now I'm trying to get the reaction and amount of rotation down.

Now anyways, I went to page 178 and 181 in v2 of the manuals trying to figure out how to implement this and frankly I just can't get this to work. yet their example seems so bone easy.... aaarrgh! Does anyone have any thoughts on how I can get this to work? Can I bribe someone for a layman's tutorial?