u need them as GCT, so you need to use code manager to convert the text files into GCT
code manager + codes
http://rapidshare.com/files/139032618/Code_Manager.rar.html
there should be a readme in there I think
otherwise when you extract you need to run code manager choose hit file on .txt file then if you've properly made your text file with the codes select which ones you want. Then on file again choose to store it as .gct on your sd card. Put your sd card in first before running the application since i found i had to restart the app since it doesnt pick up the sd card if you put it in after loading the application for some reason.
You can view the other txt files of code to see how there set out.