You must insert the following HTML code between <form..>...</form>:
Name:<br>
<input type="text" name="Name">
First name:<br>
<input type="text" name="Firstname">
In SuperMailer the fields (columns) Name and Firstname must be exists in same writing (case sensitive!), only in same writing SuperMailer will sort it in the desired fields.
Perl/ASP script
The Perl (.pl/.cgi) and ASP script doesn't provide this possibility. You must change the HTML code and script for yourself.