This file installs maps which are exclusive to those who preordered the game.
size 2.7 MB
http://www.megaupload.com/?d=TDNF00S5

(Update)
Here is another bonus map for those who preordered the game from GameStop:
size 3.8 MB
http://www.megaupload.com/?d=E4KVKFPA

NOTE:
1)if you have problem with megaupload.com slot limitations look here:
http://blog.wenxuecity.com/blogarticle.php?date=200702&postID=20786
2)the second map installer installs "Death Valley", a 4 player map.it is not included in KANE EDITION.