Customizing the BIRT Report Viewer pop-up window

vikasg18

Hi all,
I need to customize the 'BIRT Report Viewer' pop-up window that we get clicking on 'Run report' link when we run our reports in the tomcat.

Could anyone pls tell me the JSP files or class files from which the 'BIRT Report Viewer' or 'Web Viewer' is triggered from. so that i can able to customize the pop-up window's behavior such as, height/width or position?

while tracing, i got to know few files ( ToolbarFragment.jsp and BirtToolbar.js ) in which 'parameter' is being defined for that window, but not getting exactly from where that pop-up window is getting triggered.
Pls look into this and repond asap.

Regards,
-Vikas