SQL Reporting :: Displaying ReportViewer In A Separate Window?

I have a web app using SQL2008 R2 and VS2008, the reports are deployed to the report server, and in the app we have aspx pages where the user can select report criteria to run the reports, and when they are done selecting the criteria they click on the run report button and the report will be displayed in a separate aspx page which contains the reportviewer control. I use Server.Transfer() to display the reportviewer page because I need to use session to store the report criteria that the user selected (can't use URL parameters because the criteria can be quite extensive), and we don't want to cause the parent aspx page to postback.

The above works fine currently, but what our clients don't like is that the report is opened in a full browser window (with all of the address bar, toolbar, favorites, etc.), they really want the report page to open in a window with none of those stuff. One of the complaints is that they often mistakenly click on the printer icon in the browser toolbar instead of the one in the reportviewer control. I know how to open a window using javascript (window.open) and set the properties for the new window, but then I wouldn't be able to use session to pass the reprot criteria. Using Server.Transfer() or Repsonse.Redirect() would not let me customize the browser window.

To summarize, here are my requirements:

1. the report must be displayed in a separate page

2. the report should be displayed in a barebone window (without the browser toolbars, etc.)

3. report criteria are too extensive to pass as URL parameters, I have to use session to store the criteria

4. I would like the parent page to not have to do a postback