True customizability?

[Subtixx 0]

So after tinkering with the trial software, it occurred to me that there is no "true" customization possible. Is there any template like system where you can edit more than just CSS files? I'd like to edit the whole look of the application. Not just the colors.

[DennisHermannsen 21]

You can't edit the code of the design, really. You can alter it with code such as JavaScript, but not directly.