diff --git a/fulcrm_collection.module b/fulcrm_collection.module
index e0b9b08..7481800 100644
--- a/fulcrm_collection.module
+++ b/fulcrm_collection.module
@@ -30,7 +30,49 @@ function fulcrm_collection_menu() {
     return $items;
 }
 
-function fulcrm_collection_to_form( $collection_data, $d = array() ) {
+function fulcrm_collection_get_d_value( $d, $key ) {
+    $key = explode( '.', $key );
+    foreach ( $key as $bit ) {
+        if ( array_key_exists( $bit, $d ) )
+            $d = $d[ $bit ];
+        else
+            return NULL;
+    }
+    return $d;
+}
+
+function _fulcrm_collection_set_d_value( &$d, $key, $value ) {
+    switch ( count( $key ) ) {
+    case 0:
+        return NULL;
+    case 1:
+        $d[ $key[ 0 ] ] = $value;
+        return $value;
+    default:
+        if ( !array_key_exists( $key[ 0 ], $d ) )
+            $d[ $key[ 0 ] ] = array();
+        return _fulcrm_collection_set_value( $d[ $key[ 0 ] ], array_slice( $key, 1 ), $value );
+    }
+}
+
+function fulcrm_collection_set_d_value( &$d, $key, $value ) {
+    return _fulcrm_collection_set_d_value( $d, explode( '.', $key ), $value );
+}
+
+function fulcrm_collection_form_values_to_d( $prefix, $values ) {
+    $d = array();
+
+    foreach ( $values as $k => $v ) {
+        $bits = explode( '/fulcrm/', $k );
+        if ( ( count( $bits ) === 2 ) && ( $bits[ 0 ] === $prefix ) ) {
+            fulcrm_collection_set_d_value( $d, $bits[ 1 ], $v );
+        }
+    }
+
+    return $d;
+}
+
+function fulcrm_collection_to_form( $prefix, $collection_data, $d = array() ) {
     $form = array();
 
     foreach ( $collection_data[ '_structure' ] as $set_data ) {
@@ -46,11 +88,12 @@ function fulcrm_collection_to_form( $collection_data, $d = array() ) {
                 case 'text':
                 case 'email':
                 case 'tel':
-                    $fieldset[ $field_data[ 'key' ] ] = array( '#type' => 'textfield',
-                                                               '#title' => $field_data[ 'name' ],
-                                                               '#description' => $field_data[ 'description' ],
-                                                               '#required' => $field_data[ 'required' ],
-                                                               );
+                    $fieldset[ $prefix . '/fulcrm/' . $field_data[ 'key' ] ] = array( '#type' => 'textfield',
+                                                                                      '#title' => $field_data[ 'name' ],
+                                                                                      '#description' => $field_data[ 'description' ],
+                                                                                      '#required' => $field_data[ 'required' ],
+                                                                                      '#default_value' => fulcrm_collection_get_d_value( $d, $field_data[ 'key' ] ),
+                                                                                      );
                     break;
                 default:
                     drupal_set_message( t('Cannot handle ":type" collection structure.', array( ':type' => $field_data[ 'type' ] )), 'error' );