Need to add a recomended version of this module.

Right now it is not as easy as it should be to download this module using drush. It is a quick settings change on your to make it work flawlessly. See the linked article from below.

There is no *recommended* release for project zopim on Drupal 6.x. [ok]
Ask the maintainer to review http://drupal.org/node/197584 and
create/recommend a release in order to be compatible with drush and
the drupal.org security broadcast system. A recommended development
snapshot release is sufficient. Alternatively, run pm-releases
command and explicity pm-download any non-recommended release that
might be available.