I'm trying to modify Bugzilla so that when a user creates a new bug,
the "Description:" textarea is pre-filled with some customized text.
Looking through the code and documentation, I believe I need to edit
the file default/bug/create/comment.txt.tmpl to do this. However, I
see this in the current file:

[% USE Bugzilla %]
[% Hook.process("form") %]
[% Bugzilla.cgi.param("comment") %]

I don't know Perl, but that last line leads me to believe that there
is a parameter in Bugzilla called "comment". Is this correct? If so,
how do I modify this parameter? I'd rather do that then edit
comment.txt.tmpl.