nsDialogs changing control size

[th_mi]

Hello

I had the same question longer time ago. My goal is to modify the fishish page of the installer. I'd like to add a lin as text and a links as image.

Actually I'm trying to use nsDialogs to do this. My problem is the default text control with the text:

Custom Finish has been installed on your computer.

Click Finish to close this wizard.

has a to large width. Is there a way to reduce the size of this control?