You can add a custom cookie to deliver a cookie header as part of your HTTP request in browse as well as record mode. When starting to browse, choose Advanced options > Check Use HTTP settings > HTTP settings.
In the HTTP settings dialog box, a new section for managing cookies allows you to define, edit, delete, and reorder cookies.
To add cookies to a recorded script:
Select an action/page in the script and then choose Advanced > Add custom cookie.
An action for the custom cookie is created—enter the cookie name, value, domain, and path.
Run the script. Cookie header information is displayed in the HTTP headers pane of script results.