Open the config file in the folder that your nations kits are kept in. It should say something like :
<record from="england1" to="graphics/pictures/team/765/kits/home" />
At the end of the line, change it to this :
<record from="england1" to="graphics/pictures/team/765/kits/home/2009" />
This should work. To use the shirt in 2010, simply substitute '2009' for '2010', 2011 add '2011' and so on and so on.
Then when you're in the game, don't forget to reload your skin in the preferences menu. This should work.