This tutorial will teach you how to replace those yellow smilies that come with WordPress with your own smilies!
Go to your site account and look for the wp-includes folder.
Open the smilies folder. You can find it here: wp-includes > images > smilies.
Upload your smilies into this folder.
Go back to wp-includes and look for the functions.php file.
Open the file, but before you make any changes to this file, remember to keep a backup copy of the file.
Scroll your way down to the smilies section. Change the default filenames of the smilies to the filenames of your smilies.
':twisted:' => 'icon_twisted.gif',
':twisted:' => 'twist.gif',
Save the file.
That’s it. Enjoy your new smilies. ^^