Pass Argument to the printed node

I need to pass to printed node an argument in the drupal path (for example for print the page http://mysite.org/?q=node/3/argument I need the path http://mysite.org/?q=print/3/argument) but the print_controller() function don't handle the path in correct mode and don't call the correct function (_print_generate_node($nid, $cid);).

I patch the code with this snippet that work for me.
I replace line 42 of print.pages.inc with this code:
//PATCH added for permit other args after nid
$pos = strpos($args, '/');
if($pos > 0){
$nid = substr($args,0, strpos($args, '/'));
}else{
$nid = $args;
}