Sorry, I'm a dope. The 'r' method is something that happens in *my* code (or in my code's super class, anyway). All I need to do is set the uri and filename of the FakeRequest method, then call the right handler:

use HTTP::Request;
use Apache::FakeRequest;
use Apache::MP3::Urlwitzer;

    my $request = Apache::FakeRequest->new('get_remote_host'=>'foobar.
+com');

$request->uri('/Music');

    Apache::MP3::handler('Apache::MP3::Urlwitzer', $request);
[download]

My super class's new() methods set 'r' to the request. Thanks for the help, sorry for the confusion. Creeble