Automatically create/add cck field to content type

hello

I have seen your sites and it looks very attractive. and i also want to develop this type of site so could you tell me In your site "classicvinyl.biz" which modules are used and for which drupal version. and how create a combo box that will show all taxonomy terms.

Thanks in advance

I've been working on a module that (also) creates a content type, and adds a field to that content type. With some adjustments this should also work for your use case:

/**
* Implementation of hook_install().
*/
function dictionary_install() {
  // Create tables.
  drupal_install_schema('dictionary');
  // Add the node type.
  _dictionary_install_type_create();
  // Add iid field to node type.
  _dictionary_install_type_create_field();
}

function _dictionary_install_type_create() {
  // Create an additional node type.
  $dictionary_node_type = array(
    'type' => 'dictionary_term',
    'name' => t('Dictionary term'),
    'module' => 'node',
    'description' => t('A <em>dictionary term</em> is a page of content which gives describes or defines the terms listed in the dictionary. A dictionary term is references, and all translations of that term will be listed on the <em>dictionary term</em> page.'),
    'custom' => TRUE,
    'modified' => TRUE,
    'locked' => FALSE,
  );

  $dictionary_node_type = (object)_node_type_set_defaults($dictionary_node_type);
  node_type_save($dictionary_node_type);
  // Default to not promoted.
  variable_set('node_options_dictionary_term', array('status'));
}

function _dictionary_install_type_create_field() {
  // Create the iid reference field.
  $field = array(
    'type_name' => 'dictionary_term',
    'label' => 'Dictionary item reference',
    'field_name' => 'field_dictionary_term_iid',
    'type' => 'number_integer',
    'widget_type' => 'optionwidgets_select',
    'module' => 'number',
    'description' => 'The dictionary term that is being described in this node',
    'weight' => -4,
    'required' => TRUE,
    'multiple' => FALSE,
    'allowed_values_php' => "\$result = db_query('SELECT * FROM {dictionary_item} ORDER BY name');\r\n\$iids = array();\r\nwhile (\$item = db_fetch_object(\$result)) {\r\n  \$iids[\$item->iid] = \$item->name;\r\n}\r\nreturn \$iids;",
    'display_settings' => array('teaser' => array('exclude' => TRUE), 'full' => array('exclude' => TRUE)),
    'op' => 'Save field settings',
  );
  module_load_include('inc', 'content', 'includes/content.crud');
  $created_field = content_field_instance_create($field);
}

[Full source at http://users.conquer-space.net/~sara/dictionary-6.x.tgz]

Requirements: content (CCK), number, optionswidgets
The requirements will vary depending on the field you add.