Adding objects to an existing screens?

[Mike Fotes]

Is it possible to modify an existing screen by adding check boxes, radio buttons, etc.?

Specificly, I would like to add a check box option that would launch an executable on the 'Finished' screen. I would also like to add buttons for the Licence and ReadMe texts.

[bbrenner]

I have the same request. Although I only need 2 radio buttons, (Complete and Minimum), I want to put a lot more descriptive text than the screen is allowing me under each button. Right now, only part of the text can be seen.

I would also like to add an additional textbox below with instructions for a network admin person.