[Logician]

1- find a feedback mailing script that does what you want and install it. (it should be NON-vbulletin integrated so for instance Erwin's feedback form hack wont work)
2- Edit source code of its user interface (= where users fill the form) and copy its source code.
3- edit global.php, find this line:

PHP Code:

 eval("standarderror(\"".str_replace("\'", "'", addslashes($bbclosedreason))."\");"); 


replace it as:

PHP Code:

eval("dooutput(\"".gettemplate("feedbackform")."\");"); 


create a new template named "feedbackform" (in all template sets you have) and put the source code you copied above inside it.

Enjoy.