//helper functions
    public function resetData($model,$id = null) {
        if(is_null($id)){
            $data = $model->getCollection()
                ->allTables()
                ->getData();
        } else {
            $data = $model->getCollection()
                ->allTables()
                ->addFieldToFilter('coupon_id', array('eq'=>$id))
                ->getData();
        }
        Mage::getSingleton('adminhtml/session')->setCsmData($data);
    }

    public function prepareAcctForm($form, $model, $id = null) {
        $this->resetData($model,$id);
        $data = Mage::getSingleton('adminhtml/session')->getCsmData();
        $data = $data[0];
        $form->setDataObject($data);
        return array('data' => $data,'form' => $form);
    }

//Form.php
        $p = Mage::helper('csm')->prepareAcctForm($form,Mage::getModel('csm/csm'),$this->getRequest()->getParam('id'));
        $form = $p['form'];
        $data = $p['data'];

/* insert fields */

        $this->setForm($form);
    /*this used to be $form->setValues($data); and it didn't work. Changed to add and it did.
        $form->addValues($data);