No real problem here. For your first question set up your magnet for the object in question and then select Object then spawn morph target. When you export just have that morph target dial set at 1.0 or whatever. Export Wavefront Obj>Single Frame>(Only check the part you want to export), depending on your version of poser 4 or poser pro you well get a window in which you can select how you want to export it, All you need to have checked is the last one As a morph target. You can also save your magnets by opening your props menu, then click the + to add the selected magnet(s) as a prop.