Try this thread:

http://market.renderosity.com/mod/forumpro/showthread.php?message_id=2564862

Here are some magnet tutorials:

Try these links:

http://www.philc.net/magTut1.swf

http://www.drgeep.com/p4/m3/m3.htm

http://www.planet-3d.com/tutorials/basicmags/

http://www.sharecg.com/v/18967/tutorial/Poser-Magnet-Tutorial?PSID=d7e959d04da665d231897d5a7b834b05

And here is a nifty package for mirroring magnets and getting symmetrical results on both sides while only manipulating one magnet!

http://www.renderosity.com/mod/freestuff/index.php?user_id=46572

You do have to have some knowledge of magnets though, not a lot, just a basic understanding of how to create a magnet and what the 3 parts of the magnet are for.  So look at those tutorials first, particularly PhilC's video tutorial which is the one that finally hit home for me where magnets are concerned.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi