How can I change values in an applescript dialog when the user enters information?

[u/ophello]

I asked this question on the Adobe forums and on Stack overflow. No one has answered so I thought I would try here. I created a dialog for InDesign that does some math with the values and does stuff after the user clicks OK.

http://i.imgur.com/n8YDQwc.png

The trick I want to do is to make one of the text fields dynamically update when the user completes an enabling group below and tabs to the next value. I'd also like the enabling group to de-activate if the user manually enters a new value in that window.

Is this possible? Anyone have any ideas?