ah i see try using a app called "Appmanager for cupcake" it gave me no problems. When you save the apk to your sd card open appmanager and open the menu, then push "install", if nothing shows ups open the menu again and push "whole sd" (this will show all the apps). The apk should be there in the list somewhere. Now just click the apk file and push install (you might have to turn on the non-market app install setting) and it should work.
Now just goto locale and set it as your keyboard, and on the keyboard itself set it as the keyboard using 123?. If there are any problems just ask. If this doesnt work, im not really sure whats wrong.
Oh and i would recommend getting the calibration tool as well from the same forum. Just do the same thing and install it. cheers