Hi comicbook,
Welcome to Auctiva!
You can place images directly into the description editor using the "Insert an Auctiva Hoted Image" on the bottom-right of the editor toolbar(it has an icon reflecting a mountain and sun on it).
If you would like us to tak a look at the specific listing you are referring to and advise you on how to format your listing to achieve the desired result, please file a support request using the appropriate link on our help page:
http://www.auctiva.com/free_auction_software_help/help.aspx
-Mike