Customise Project Classification form to use a dynamic lov to link projects

Hi,

I want to use Project Classifications and Class Codes to link projects.

Example: When Creating Project A be able to select from a Classification "Parent" the Project B.

I know that this is possible if I define "Project B" in the Project Classification Class Codes values but the client doesn't want to go to create a new value each time that a project is created.

Is there any way to customise the Project Classification form so that once a new project is created automatically the project value is updated in the Class Code region of the form?

How can I do that? Is it too complex?