To magnetize the clothing:

Load V4.

Load the clothing item or items and conform.

Go to the pose folder and find the magnetize poses.

Select the first clothing figure.  Apply the magnetize to V4 pose.  This should magnetize the clothing item.

If you have more than one conformer, select the second one.  Apply the magnetized to V4_2 pose.  This magnetizes the second clothing item.

Continue on with each conformer, applying the magnetize to V4_(#) to each one separately. 

I don't know what you do if you get past 9 conforming items. 

I gave up on the magnetize poses as too much of a pain.  I do the conforming, pose and then use the morph brush to fix poke through. 

I'm not exactly sure but I think the magnetizing pose adds magnets to the clothing item the same as are attached to V4.  It supposed to make the clothing conform better and eliminate poke through.