I can tell you how I've done something simliar, but it's kinda messy.

In the php code that generates the form, make the 'id' names of the field something like '$i."__{fieldname minus brackets}". Where $i is an incrementing number with each 'address' group of fields. Then You've got to be a bit tricky in the 'save' function. U have to make a loop to create a new 'address' for each address group including a save function. Confusing? Here's my loop around the save function

IF($this->Request->isPost()) { FOR($i=1;array_key_exists($i.'__source_spot_id',$this->params['spots_transfers']);$i++) { $_s_t = array('source_spot_id' => $this->params['spots_transfers'][$i."__source_spot_id"], 'dest_spot_id' => $this->params['spots_transfers'][$i."__dest_spot_id"], 'unit_qty' => $this->params['spots_transfers'][$i."__unit_qty"], 'unit_id' => $this->params['spots_transfers'][$i."__unit_id"], 'user_id' => $this->USER_ID ); $this->parent[$i] = $this->SpotsTransfers->cloneRecord(); $this->parent[$i]->setAttributes($_s_t, true); IF($this->parent[$i]->save()) { $this->f .= $this->params['spots_transfers'][$i."__description"].", "; }; } // Here I have cut out some logic on where to go next, for sake of clarity } Like I said, not pretty, but it does work. I too would like to know a way to create multiple entries all at once without resorting to silly $i__ names.

Here is my controller action. It doesn't handle deleted addresses or validations yet but I'll post a complete example on the wiki in a few days.

    function edit()
    {
        if (empty($this->params['id']))
        {
            $this->redirectToAction('listing');
        }

        /* finder_options isn't working in the current svn so you still have add the options to find() */
        $this->company = $this->Company->find($this->params['id'], $this->finder_options['Company']);


        if(!empty($this->params['company']) && !empty($this->params['id']))
        {
            $this->company->setAttributes($this->params['company']);


            $address_count= count($this->params['company']['addresses']);
            /* This loop will be changed to a foreach */        
            for($address_counter=0; $address_counter < $address_count; $address_counter++)
            {                    

                if (empty($this->params['company']['addresses'][$address_counter]['id']))
                {
                    /* add new address */
                    $this->company->address->add(
                        $this->company->address->build($this->params['company']['addresses'][$address_counter])
                    );
                }
                else
                {
                    /* update current address */
                    $this->company->addresses[$address_counter]->setAttributes(
                        $this->params['company']['addresses'][$address_counter]
                    );
                }
            }

            if($this->Request->isPost() && $this->company->save())
            {
                $this->flash['notice'] = $this->t('Company was successfully updated.');
                $this->redirectTo(array('action' => 'show', 'id' => $this->company->getId()));
            }
        }
    }

i have 1 question, this is my code:

        if(!empty($this->params['product'])){

        $this->Product->setAttributes($this->params['product']);
        $this->product_detail->setAttributes($this->params['product_detail']);

        $this->product->product_detail->build($this->params['product_detail']);

        if ($this->Request->isPost() && $this->Product->save()){
            $this->flash['notice'] = $this->t('Product was successfully created.');
        }

now the form shows the validation errors of product, but how i can show the validation errors of product_detail too? (product and product_detail has a relation of 1:1). from what i understood, the 2 validate method of each class are called, but i can only show the product errors, dont know how to access the other ones, my form look like this:

<?php  echo $active_record_helper->error_messages_for('product');?>
 // this doesnt show anything <?php  echo $active_record_helper->error_messages_for('product_detail');?>

    <?php echo $active_record_helper->input('product_detail', 'title')?>
    <?php echo $active_record_helper->input('product_detail', 'description')?>

    <?php echo $active_record_helper->input('product', 'license')?>
    <?php echo $active_record_helper->input('product', 'avail_from_on')?>

i think there should be a way of adding the validation errors of product_detail to product errors, well i think that could be the way to go.