I found a great backgrounds pack! It has all the stadiums for the English teams, from League Two to the Premiership! If you install it it replaces the normal backround picture to the stadium picture of the resprective team (that is if you enable «show background pictures» in your display & sound preferences).
How to install it
It’s very simple. Unrar the file and place it into your \My Documents\Sports Interactive\Football Manager 2009\graphics\backgrounds folder. If there is no «backgrounds» folder create one.
Here is just a sample, my Chester City stadium, The Deva Stadium. Looks great ;)
You can download the backgounds pack from here, the size is around 11 MB.