delphi help?

i have been using delphi at school to do my assignment.

i added a form to the repository so i could use it as a splash screen or whatever you call it (when you use the same form as like the base for other forms in the same project and they are all kind of linked together)

but now i want to change something on that form. is there anyway i can change it on all of them without actually changing it on all of them (like, just changing it and then re adding it to the repository) without losing all the coding behind the forms and having to start again?

please help me. i HAVE to change it, and my assignments due in a couple of days so i don't have time to do the whole thing all over again