yes, this can be done but will take some hand coding.
create a the rank select list and a hidden element for the score, then add code at liune 1 to set the score value:
<?php
if(isset($_POST['rank']) && $_POST['rank'] != "") {
switch ($_POST['rank']) {
case "1":
$_POST['score'] = "10";
break;
case "2":
$_POST['score'] = "6";
break;
case "3":
$_POST['score'] = "3";
break;
case "4":
$_POST['score'] = "2";
break;
case "5":
$_POST['score'] = "1";
break;
}
}
?>
then in the update behavior, bind the rank column to the rank form element and the score column to the score form element.