{COMMENTADMIN} - If viewer can edit the comment, contains link and image to do so... otherwise empty.
{COMMENTTYPEOPTIONS} - Contains the options for selecting the comment type.
{COMMENTPREVIEW}
{COMMENTDATE} - Date on which comment was posted.
{COMMENTLASTEDITDATE} - Date on which comment was last edited.
{COMMENTID} - Id number of the comment.
{COMMENTICONIMAGE} - The post icon image HTML.
{COMMENTLINKID} - Id number of the image which the comment is about.
{COMMENTLINKNAME} - The title of the image which the comment is about.
{COMMENTPOSTERNAME} - Name of the poster.
{COMMENTMESSAGE} - The actually comment text.
-- Optional parameters: {COMMENTMESSAGE[x]} cuts off the text after x characters. {COMMENTMESSAGE[x <,> option]} - "option" can be either "remove" to remove all quotes and wsn codes from the comment, or "docodes" to parse the codes and smilies. Not using the parameter defaults to not parsing the codes but not removing them either.
{COMMENTIP} - The IP address of the comment.
{COMMENTOWNERID} - The member id number of the member who owns the comment.
{COMMENTTYPE} - The comment type of this comment.
{COMMENTAPPROVED} - Number of people who have approved of the comment.
{COMMENTDISAPPROVED} - Number of people who have disapproved of the comment.
{COMMENTVOTES} - Total number of respondants rating a comment
{COMMENTNUMBER} - The position in which the comment appears in the thread.
{COMMENTCATID} - The id number of the category the comment is in.

Category and image template variables can be used and will reflect the category/image the comment is associated with.