I was never 100% clear on what v4 magnetize poses did, something to do with making the clothing follow her movements better.   You apply them to the clothing not the figure and use a new pose for each piece of clothing.  

To adjust clothing with magnets simply spawn a new magnet prop and parent it to the clothing group that you want to affect.  Then you move the flat 'base' to the area you want to effect and move the magnet part around, it will pull the mesh.  To get the effect you want will probably require a few magnets applied to the different groups and a lot of playing around with magnet strength and position.