Great! Thanks for the response.
1) I am getting the Mercury Web Recorder NTLM authentiction window only when i record a script using the protocol: web- HTTP/HTML on firefox. this adds a section web_set_user method at the top of the script. but when i record the script using TruClient - Ajax Firefox, i am not getting the pop up for NTLM.
2) If I am not getting that dialog box, how we can use multiple users to do testing on this?
3) Yes. in the script view it is readonly and i can edit the steps on recording on the browser. But it always take my network details to do NTLM.
4) it is VuGen 11.52 and Fire fox 26.0 (Shown in options-> help-> about Firefox). [http://www.mozilla.org/en-US/firefox/new/ that link says 'Congrats! You’re using the latest version of Firefox.' ]
Thanks