Setting className in datablock

I'm trying to clean up some of the code I've been hacking together over the last week and am trying to move more data into datablocks. I'm having problems defining a class though in a datablock.

datablock t2dSceneObjectDatablock(enemy){
   health = 50;
   dmg = 100;
   className = EnemyClass;
   size = "9 8";
};

This does not seem to work. Unless I specify "EnemyClass" as the class in the level editor, the object does not respond as it should. What did I do wrong here?

Also, is there a reference that provides all the values you can specify in the datablock as they relate to the level editor? I'd like to put all my collision and physics settings into the datablock, so I can quickly add objects to a scene, specify their datablock and be done with it.

Thanks!