take a screenshot of the dialog, color it in cut a little bit of the titlebar and add to new paint, then save as .ico using a program so there will be an icon but it wont be visible
Umm, that would be a good idea if it was a personal script, but I'm planning on releasing this script to the public. Not everyone uses the same titlebar color.
Well you could use a completely transparent icon, but the title bar text wouldn't move to the left, it would just leave a blankspace where the icon is normally.