>>>>I just wrote one myself, and was amazed that it worked!
>
>open database
>modify structure
>
>that's it, create a new prg file add it to a project and compile to make
>and exe.
>
>
>Is there a program that does this already? If not, do you have any ideas on how to go about writing such a thing? The pack command I think I can handle. :) But I have no idea how to modify the structure programatically.

see ALTER TABLE command.