Hi,
Note that if Windows Installer detects that the file is already installed it will not overwrite it.
However, if you need to make sure that the file will not be overwritten, you can create a search for the file by using the "Search" page:
http://www.advancedinstaller.com/user-guide/search.html
You can use the result of the search to condition the installation of the component of the file (usually the property of the search is RESULT_PROPERTY). This is done in the "Organization" page in the "Component Properties" section:
http://www.advancedinstaller.com/user-g ... rties.html
Regards,
Cosmin