Q:

How to change "add to comment" in comment form?

When CCK was not in core, as in Drupal 6, and you selected a node type for comments on other node types, the comment form would say the name of the content type instead of comment. In this case, I want the comment form to say 'Add New Review' instead of 'Add New Comment'. Does anyone know how to do this through a module or configuration?

A:

Create a seperate .tpl file for comment-wrapper named comment-wrapper.tpl.php. 
To create a seperate template file for node specific comment wrapper you can create using
comment-wrapper-contenttype.tpl.php copy the code from core comment-wrapper.tpl.php and change the title in the code given below.
While copying from core comment-wrapper.tpl.php don't forget to remove the validation which is meant for forum node types only.
<h2 class="title comment-form"><?php print t('Add new comment'); ?></h2>

A:

You can do it by implementing hook_node_view_alter(), in your module or theme(template.php).
function myThemeOrModule_node_view_alter(&$build) {
  if ($build['#node']->type == 'page') {  //extra check for content type (optional)
    $build['links']['comment']['#links']['comment-add']['title'] = t('Add new review');
  }
}

A:

You can use the "strings override" module to change the text.

