Insert to where? If you want to disable graphic smileys ("emotions") in your forum posts, just check the "Disable Smilies" box before making a post. You can find this box below your message text.
As you might know, Atlantis has a collection of clips. The standard clip collection (or Clip Library) includes 4 smileys. Any clip (including those smileys) can be inserted in your Atlantis document through the keyboard. If you type "*smi" in your document, Atlantis would display a popup list of the clips whose filename begins with "smi". You could easily choose the desired smiley from this list. But clips can be inserted to a document as-you-type only when the "Replace clip names As-You-Type" option in the "Clip Library Option" dialog is checked. To display this dialog, please click the button at the bottom of the Clip Library panel. Please click here for details.