Package files can be used to display text information during installation or removal. This feature can be used to display a license agreement during installation.
To display a licence information, the PKG file must include a line as shown in the following example:
"HelloWorld.txt"-"", FT, TA
No destination is specified, because the file is not installed. FT means
that the file contains text to be displayed during installation and TA (text
abort) specifies that the license agreement dialog contains an option to abort
the installation. If TA is not specified, the default is
a dialog with a Continue button.