OK so what  i am tring to do is make an outfit on M4 with the body suit. Now that suit has to have a yin and yang on the chest, but one side of the yin yang has to be "cut out" showing his chest. Can i achieve this with a trans map? If so any info how to make one?

Here is a link to one of several tutorials.

http://www.ebonshire.net/tut-posb/p-trans-easy.php

Just google 'transparency maps for poser' and you will find other links.

Yes. This is how I would do it.
In your photoediting program load your texture for the body suit. This is for the placement of the symbol.
Make a new layer fill it with 100% black. This will be your Trans map layer. 100% black is transparent, 100% white is visible. Change the opacity so you can see the bodysuit texture beneath.

Load your symbol in a new layer.  Make sure what you want to be invisible is 100% black and the other is 100% white. If you need to you can invert this layer. Scale and place as needed.

Make sure your symbol layer and transparency layers are 100% opacity, Merge these two, save it out. Apply.

"Few are agreeable in conversation, because each thinks more of what he intends to say than that of what others are saying, and listens no more when he himself has a chance to speak." - Francois de la Rochefoucauld

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awesome thanks for the info, gonna try and do it sometime soon. You guys rock