how to save a cck node value from inside a rule that is doing other php stuff via a display message action

I have a rule, on "saving new content", if that content is a content type group, then ... well, then create a ubercart attribute option value and also enable that value. I have a first pass at coding that, and I want to add into it, saving the option id (and probably eventually the product node id and the attribute id) that is to be paired with that "group". How do I save a cck field value for that node that is being saved? Probably this has something to do with node_save, but I'm not sure if the node has already been saved, or is about to be saved ... ? I want to set the cck field storeoptionid to be the oid.

Here is an export of the rule:

array (
  'rules' => 
  array (
    'rules_6' => 
    array (
      '#type' => 'rule',
      '#set' => 'event_node_insert',
      '#label' => 'create a ubercart option value for a group on group node creation (adding a  group)',
      '#active' => 1,
      '#weight' => '0',
      '#categories' => 
      array (
      ),
      '#status' => 'custom',
      '#conditions' => 
      array (
        0 => 
        array (
          '#type' => 'condition',
          '#settings' => 
          array (
            'type' => 
            array (
              'group' => 'group',
            ),
            '#argument map' => 
            array (
              'node' => 'node',
            ),
          ),
          '#name' => 'rules_condition_content_is_type',
          '#info' => 
          array (
            'label' => 'Created content is Group',
            'arguments' => 
            array (
              'node' => 
              array (
                'type' => 'node',
                'label' => 'Content',
              ),
            ),
            'module' => 'Node',
          ),
          '#weight' => 0,
        ),
      ),
      '#actions' => 
      array (
        0 => 
        array (
          '#weight' => -4,
          '#info' => 
          array (
            'label' => 'Execute custom PHP code to add the option',
            'label callback' => false,
            'module' => 'PHP',
            'eval input' => 
            array (
              0 => 'code',
            ),
          ),
          '#name' => 'rules_action_custom_php',
          '#settings' => 
          array (
            'code' => ' module_load_include(\'inc\', \'uc_attribute\', \'uc_attribute.admin\'); 
$form_state = array();
$myaid->aid=2;
 $form_state[\'values\'][\'name\'] = check_plain($node->field_groupname[0][\'value\']); 
drupal_execute(\'uc_attribute_option_form\', $form_state, $myaid);',
            'vars' => 
            array (
              0 => 'node',
            ),
          ),
          '#type' => 'action',
        ),
        1 => 
        array (
          '#weight' => 0,
          '#info' => 
          array (
            'label' => 'Show a configurable message on the site and enable the option on the membership product',
            'label callback' => false,
            'module' => 'System',
            'eval input' => 
            array (
              0 => 'message',
            ),
          ),
          '#name' => 'rules_action_drupal_message',
          '#settings' => 
          array (
            'message' => 'Added the group name <? echo $node->field_groupname[0][\'value\'] 

for nid <? echo $node->nid ?> to the list of groups in the join product drop down (attribute 2) option list. <?
$myaid->aid=2;
$myproductid=19;
$myoptionname = $node->field_groupname[0][\'value\'];
$result = db_query("SELECT myoptions.oid FROM {uc_attribute_options} myoptions WHERE myoptions.name = \'%s\' AND myoptions.aid = %d", $myoptionname, $myaid->aid);
if ($row = db_fetch_object($result))
{
echo "Option id matching that name is: ";
echo $row->oid;
echo ". ";
$productresult = db_query("SELECT myprodoptions.oid FROM {uc_product_options} myprodoptions WHERE myprodoptions.nid = %d AND myprodoptions.oid = %d", $myproductid, $row->oid);
if (db_fetch_object($productresult)) {
echo "The option was already enabled. Contact developer. ";
} else {
db_query("INSERT INTO {uc_product_options} (nid, oid) VALUES (%d, %d)", $myproductid, $row->oid);
echo "Enabled option $row->oid on product (node) $myproductid";
echo ". ";
}
if ($row = db_fetch_object($result))
{
echo "Oops and there were other options matching that name: ";
echo $row->oid;
while ($row = db_fetch_object($result))
{
echo " ";
echo $row->oid;
}
echo ". ";
echo "Having more than one option with the same name is going to cause problems. Contact a developer and delete the group you just made. Create a new group with a slightly different name.";
}
$node->field_storeoptionid[0][\'value\']=$row->oid;
}
else {
echo "no options found with that name. something is really wrong. contact developer.";
}
?>
',
'error' => 0,
'#eval input' =>
array (
'rules_input_evaluator_php' =>
array (
'message' =>
array (
0 => 'node',
),
),
),
),
'#type' => 'action',
),
),
'#version' => 6003,
),
),
)
?>