First, you need to remove the Modal specification. With the Modal specification, you will not be able to transfer control to your selected script, without closing your JMP AUTOMATION window.
Names Default To Here( 1 );
User_Input = New Window( "JMP AUTOMATION", //<< modal(),
H List Box(),
Button Box( "Confidence Intervals",
Include( "$SAMPLE_SCRIPTS/confidence.jsl" ) ),
Button Box( "Collinearity",
Include( "$SAMPLE_SCRIPTS/democollinearity.jsl" ) )
);
The actual specification for the Button Box() is
y = Button Box( title, script )
See the Scripting Index for details and example.
Therefore, all you need to do is to add the script to Include the script you want to run.
Jim