Is there away to add one dile or morph target to two body parts in poser 5? I'm trying to make the fins to this one model longer.. but when I add a magnet to the uper fin.. the lower fin stays put while the uper becomes all distorted when I try and make it longer.. I want to make them both to move and get longer rather then just one or the other.. And note, the scale don't really work as it distorts other parts of the model. So.. can this be done?

You can add more than one body part to the magnet. Select the Magnet, goto the Properties Palatte, click on "Add Element to Deform" and select a body part (in your case, the lower fin).