Good.  At least now we know how to approach some solutions.  To answer your question, shader nodes from other V4 characters can be incorporated for V3 use.  However, some shaders are designed to be used under particular lighting settings which may not work correctly all the time.  For example, Face_off created skin shaders based on lighting set ups.  Change a light and you would need to rerun the shader script.  The VSSProp developed by bagginsbill uses a different dynamic to not only apply shader nodes to skin texture but apply Gamma Correction and AO to the material as well.  This adds a little more realism to the renders.  There are at least 3 VSSPropPR3 in circulation, the original, the second with no gamma correction and the third with no AO. 

In your case, Poser 7 needs Gamma Correction applied to all materials in your scene.  Bantha has put out an excellent Python Script which adds the necessary nodes in the material room.  Link below.
http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2773679 
This is a must have for your particular Poser version. 
Gc should also be applied when using VSSPR3 for all versions of Poser except PoserPro.  That value should be equal to 2.2, that is the gold standard for all digital cameras, scanners, printers and the internet. 
Below is a link my most recent gallery upload using Stephanie Petite and a skin texture that is several years old used with BB's VSSProp:
http://www.renderosity.com/mod/gallery/index.php?image_id=1903015