You can integrate all fields on the header screen into an ASCII file.
Some of the mail/merge codes include:

    salutation - *sa
    first name - *fn
    last name  - *ln
    address 1  - *a1
    address 2  - *a2
    city       - *ci
    state      - *st
    zip        - *zi
    phone1     - *po
    phone2     - *pt