I thought I'd expand on my post from the front page about Backdrops. First you need a portrait, so heres an original..Original..as you can see it needs help. So first we start in Photoshop, and we adjust the levels and do a little playing with color...then I cropped it... Adjusted Portrait.
 Now we want to get rid of the background, so we can play with others looks. There are a lot of ways to get rid of the background, but heres the way I did it. 1)..opened the image up in the extract window...you'll find it in the filters. Once you trace the body of work you wish to keep,you then fill it with the bucket tool...then select OK. Now you should have something like ...This.
Now comes the part you can not duplicate using just one real backdrop...putting many different backdrops in behind the subject to see which one suits not only your eyes choice, but the color tone of their faces. You can see how hard that woud be using just one piece of cloth.
  So here are some examples of digital dackground choices...
 A.  Using the ice picture I took.
 B.  A grey layer I made in Photoshop.
 C.  Grean layer made in Photoshop.
 D.  A picture I took a Disney Land.

  So even thou I have 6-7 backdrops, one...a green chromeakey and another 2  of which I dyed and painted myself...you can see the advantages of digital backdrops..hope this was od use ..