I am not quite sure what you want to do here, but did you know that you "friend" (joking ;--) can generate a closure "on the fly"?

It goes simply like this:

 my $self={};
XML::Twig->new( twig_handlers => { 'a/b' => sub { $self->my_method( @_
+); } );
...
sub my_method
  { my( $self, $t, $elt)= @_;
    ...
  }
[download]

Simon Cozens' Achieving Closure article has more details on closures, using XML::Twig as an example.

Does that help?