I simply refer to the position chart Reginald made on his website :
http://footballfigure.net/StockPlayer_2.html
Then, I search for photos on internet for each player I want to reproduce, and compare to the stock FF.net figure. Then, I make the adjustements needed (sometimes I completly rebuild the fig ! ), or even let the figure in stock position, directly out of the bag.
I'm always searching for two things, even if I 'm still unexperienced in gaming : making the figure good looking BUT eficient on the field : so I stay away from too dynamic or exotic poses.
Finally, for the "real" players choice, here again I keep it simple, and simply use the starting squads 2009 roster
Dimitri