Location of smiley graphics
C:\Program Files\Yahoo!\Messenger\Media\smileys

If you've edited before you should be a pro by now. Remember the .gif files are used in the IM window and the .bmp files are the images that you see on your drop down menu (which is why none of the "secret/hidden" smileys have .bmp files

Editing...
make your way to C:\Program Files\Yahoo!\Messenger\Media\smileys
now lets say you decided to remove the devil...
the files you'll need to change are...
16.gif (IM window) rename this to 16_original.gif
16.bmp (drop down menu) 16_original.bmp


now grab the image you wish to use in its place...  Change the current file name 16.gif and drop it in your smiley folder (C:\Program Files\Yahoo!\Messenger\Media\smileys) this will give you an image that appears in your IM window, if you wish to have one on your dropdown menu then simply create a .bmp file from one the frames used in the animation, save that image as 16.bmp and drop it into the smiley folder.. its that simple all done


NOTE:
in version 5 the smileys files were named alphabetically A-Y but in 5.5 the files are named numerically.. which is why previous edits no longer work. This includes the exe files that are readily available on the net... the ones created for v5 won't work with version 5.5
Editing Smileys
Download CUSTOM SMILEYS here
Home