...i hear this is a vargas style type and also alot of them are done in poser 7...but is it possible to take a 2d pic from sl and import it into poser 7 to come up with this http://www.flickr.com/photos/20504983@N04/3091156895/ 

The answer to your question:  No, you cannot transform a 2D picture into 3D.  You can place a 2D image on a cube, or alpha plane in a 3D software program, but its still 2D.  on a cube you have the same image on all six sides.  Think a glass cube on one's coffee table where you have six photograph cutouts pasted on it.

  Saying that Poser whatever has pre-made character meshes with plenty of dials that you can use to change body and face shapes-eg face:  you can make the nose smaller, larger, fatter, longer, twist it plus many other nose adjustments, eyes, smaller, larger, narrower, wider, up, down, slanted etc. 

After a few hours of dial flipping, coffee, Excedrin, you can get a very attractive face completely different that the preset one-same with the body.  Some folks get the V4 mesh for DAZ along with the body and face morphs, import them into Poser 7 and create their Jessica Alba's.

What I suggest you do is go to DAZ.com, locate their face and body morphs, check out what they can do--for the face, they have several hundred dials same for the body.  No I didn't buy the face and body morphs.  However, I did get a free V3 with some morphs VIA 3D World Magazine and searched Rendo's freebie section for at least a dozen face and body part morphs (lovely ones done in Zbrush and don't require the darn DAZ head and body morphs).  Jan