Ain't nobody here but us monks ... this is not a Dreamweaver forum, but you're in luck, there are some helpful things:

• HTML::Template::Filter::Dreamweaver
• Dreamweaver/Perl integration tools
• Template

update: I once wrote something like:

use HTML::Template;
my $t = HTML::Template->new(
    scalarref => \'[%!-- TMPL_VAR name="foobery" escape=html --%]',
    filter => sub {
        my $text_ref = shift;
        $$text_ref =~ s|
            \[\%
            (?:!--\s*)? # 
            (
                [Tt][Mm][Pp][Ll]_
                [^\]]+?
            )               #$1
            (?:--\s*)?
            \%\]
        |<$1>|xg;
    }
);

$t->param(foobery => 'barbery>>');
die $t->output();
__END__
barbery&gt;&gt; at html.template.pl line 11.
[download]

which ought to be Dreamweaver friendly (you write in HTML::Template tags except you substitute < with [% and > with %]. If you do decide to go this route, it's a good idea to make use of template caching ;)

update: whoops, added missing \/? to regex ... basically updated regex (it's pretty thorough now, although it won't catch NAME="foo%]berry" which is pretty bizzare thing to have.)