I solved the problem by making an extension with following content. Still looking for a betterway though.
if ($_POST["cmd"] == ""){
$location = $this->pi_getPageLink($GLOBALS["TSFE"]->id)."&rU=".$GLOBALS['TSFE']->fe_user->user['uid']."&cmd=edit";
header("Location: ".$location);
}
Cheers. Troels