Create several exe files of the same program

Hello,

I have a program which consists of about four forms. I need to create four versions of this program to go into four locations and store the versions on one PC for editing.
I have tried starting new projects and just importing the forms from the original program, because I cant be bothered creating all new forms again, but when I do this the changes I make in the new project affect the original project.

So is this a case of designing the forms again four times over or can I simply copy the forms so the programs can be edited and run as different projects,

Hope this makes sense, thanks in advance,

Gareth