PPD Standard File Format

            +--------------------------------------------+
     (Data) | Data | Dir | Dir Size | PPD Flags | PPD ID | (Data)
            +--------------------------------------------+

    ^ Start Of File                                  End Of File ^

    (Data) could  be  any  data  found  in  the  file.   It  could be EXE
    code, another database or any other data file.

    Data is the  set  of  data  catalogued  in  the  Dir.   Each block of
    data is < 64kb.  A data block  may  be  a small database.  A database
    may be any size up to the LongInt limit,  except for databases inside
    databases which have a limit of 64 kb.

    Dir is the directory of data.

    The Dir Size is a 2 byte  word  specifying  the  number  of directory
    entries.  The number may be zero, indicating  no directory or data is
    present in the file.  Unlike the  InEXE  file, in this database there
    may be no data which is not catalogued in the directory.