Graham Mwebvendor If you want to use the standard forum without custom twig then download http://xtgem.com/css/xtforum.css to your site and rename it xtforum_template.css it then gets automatically linked to the forum page xt_forum is the main forum body class
and you can customize it as much as you like

registered users on the blog use either the image they set in their xtgem profile or if they have one the image they set for their email at http://gravatar.com if neither are set then it uses the default user image from gravatar the images come in 16/32/64/128 and 150px sizes just change the number in
comment.author_profile.avatars[16]