[Ken Case]

You can change keyboard shortcuts in System Preferences (search for "keyboard shortcuts"), though unfortunately it's not the friendliest interface ever. (But it is fairly flexible, letting you change keyboard shortcuts for all applications or for any specific application.)

But before you go to that trouble, you might see whether "Move Left" and "Move Right" commands might be more convenient for you: they perform the same operations, and are bound to the keys Control-Command-Left and Control-Command-Right. (Well, they perform the same operations in the build that's about to be posted; before that, Outdent and Move Left behaved slightly differently and feedback indicated that everyone preferred the Move Left behavior.)