Hi MuraliAsok,
From my experience, we can only add or remove some dialogs in the setup wizard. We can also modify the content of the controls on the dialog, but we cannot do other custom behaviors, such as modify the location of a textbox.
We can use WIX which provides lots of supports for custom user interface. This is a tutorial of WIX:
http://www.tramontana.co.hu/wix/.
Let me know if this helps or not.
Aland Li
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