If you don't want any text for any of the content items, you can just set the message length (last option on both the CMS and Forum options pages) to 0. Of course, upon testing this, I noticed that the "..." and "Read More" still show up. :/
As far as making the content area narrower, in the StyleVars, adjust the value of 'dbtech_vbslider_cms_content_width' (CMS) or 'dbtech_vbslider_forum_content_width' (forumhome) to a different value which suits your needs.