I have the same problem with the Cube Config Tool version 4.1 on a HTC Touch Dual from europe with iCube installed on it,
Its not a rebranded model like the Sprint, its with the original HTC logo on it, bought from HTC in europe.
When trying to startup the cube config tool it comes up with an unexpected error in CubeConfig.exe. Ill post u the detailed error message at the bottom of this post if that helps debugging the problem.
Another minor bug i found is that since my Touch Dual isnt in english but in danish the Cube Config Tool creates a folder called Programs inside my Programs folder in the start menu (called Programmer in danish) and then creates the shortcut in there. So the shortcut is in Menu, Programmer, Programs instead of just in Menu, Programmer.
I can simply remove this folder and move the shortcut which isnt a problem.
Here's the detailed error:
as said above this is made originally for the vogue and has been known to work on some other phones but not all. so if it doesnt work you will have to dothe registry edits manually.