Don't tell me you are keeping track of everything by their apperance!
Correct (meaning less hassle & easy to implement , maintain and extend) solution is to have logical data separate from the visual one.
If you have them separate, then it should be no problem to add a some new entities in your datastructure, even if thats an int array. Assuming the Pascal version/clone? you are using is object oriented (i.e. derived from Object Pascal), it'd be 10 minutes of coding.
If first sentence actually describes what you are doing right now, or even if it des not, I believe I can help you with general desing and other theoretical aspects of your game. If interested, let me know, so that I can give you an e-mail address that I check more frequently.