[TYPO3-calendar] flexible saveEventToPid?

[Martin Keller]

which brings me to the next step - creating a hook-extension "mk_calsavepid" 
with two basic files.
The concept behind the extension is to post-process a stored event to move 
it to a different pid. I hope I will find all neccesary data in $this. This 
is why I do the t3lib_div::debug().

ext_localconf.php
<?php
// registering the hook
$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['ext/cal/controller/class.tx_cal_controller.php']['saveEventClass'][] 
= 
'EXT:mk_calsavepid/class.cal_controller_saveeventhook.php:&tx_mkcalsavepid_saveEventClass';
?>

class.cal_controller_saveeventhook.php
<?php
/*
    realizes a "saveEventClass" hook with function "postSaveEvent" for 
extension cal
    See more details in ext/cal/controller/class.tx_cal_controller.php - 
function saveEvent()
*/
class tx_mkcalsavepid_saveEventClass {

  function postSaveEvent (&$this) {
    // here comes the code
    t3lib_div::debug($this,'function postSaveEvent &$this');
    die('class tx_mkcalsavepid_saveEventClass:done!');
  }

}
?>
a) do I have to require_once or otherwise include the class? (I did not see 
it being done in the samples)
b) ext_localconf is included in temp_CACHED_FE_psb4eb_ext_localconf.php, so 
far it works
c) in class.tx_cal_controller.php in function 
executeHookObjectsFunction($hookObjectsArray, $function) $hookObjectsArray 
is empty(???) This gives the hint that my ext_localconf is wrong.
d) the die() statement never appears

Why dont I see a die() statement, where is my bug?
Sometimes I see a "&" in ext_localconf befor the classname. What does it 
mean?

kind regards,
Martin