If you want to copy a slot from a culture to an other, you must have tow objects(sfSimpleCMSPagePeer::retrieveBySlug) tow times. method setSlot doesn't work as is expected if you get slot (->getSlot) with a different culture
[[file: sfSimpleCMSPage.php - line 80]]
function setSlot($name, $culture, $type, $value)...
..
if(!$slot)
{
##### THIS WILL NEVER HAPPEN IF U ALLREADY call getSlot on the same instance of a sfSimpleCMSPage object #####
$slot = new sfSimpleCMSSlot();
$slot->setName($name);
$slot->setPageId($this->getId());
$slot->setCulture($culture);
}