This tutorial will teach you how to add custom smiley images into the WYSIWYG editor.

1. Create your smiley. The image should be a 19px X 19px .gif file.
2. Drop your .gif file into CMSAdminControls\FCKeditor\editor\images\smiley\msn\
3. Open CMSAdminControls\FCKeditor\fckconfig.js
4. If this file hasn't been changed, it should be line 406 that you need to modify. This line lists all the smiley file names. Simply add the name of your file to the end of it.

I used a lot of custom smileys on an old site I used to run and people really loved using them in the forums. You can also make a smiley of your company's logo!