regarding an include program

I have an include program which is for user modification.

But how can i modify it without access key.

The comment in include is

************************************************************************

• *

• This include is reserved for user modifications *

• *

• Forms for sales document processing *

• *

• The name of modification modules should begin with 'ZZ'. *

• *

************************************************************************

how to write my code in this without access key.

Thanks in advance