I've finished upgrading the Tiberium Crystal War 2.0 code-base and Test Client to version TT 4.2.2 which was recently released.
This means that future mappers and modders for TCW 2.0 will be able to create custom key configuration files and code that allows players to press certain keys to do functions.
Custom Load Screens are also an option here for mappers. You can create your own custom loading screen which shows up while your level is loading
A detailed report on what's new in 4.2.2 can be found here and here.