Go to My DocumentsMy GamesAge of Empires 3Savegame open the 
sp_yourcityname_homecity.xml (make sure you back up this file) and find 
the line . The line should look something like this xx, where xx is the 
current number of card unlock ponts you have. Change xx to a high number 
such as 999, save the file, start Age of Empires 3 and go into a skirmish. 
Go to where you manage your decks and now you will have 999 unlock points 
to get more cards for your deck.