Nice one. Are you adding a backward-compatibility setting, as a constant for this?

Code:
const int GHOST_USE_ENEMY_NAMES_FOR_SCRIPTS = 1; 

if ( GHOST_USE_ENEMY_NAMES_FOR_SCRIPTS ) gohst_use_at_sign_routines();
else ghost_use_misc11_misc12();
Something like that would be good. Just set the constant in the main header file, and use it as needed. That will prevent conflicts with games that are built on the old system.