http://www.icyphoenix.com/viewtopic.php?f=32&t=5717&p=38315#p38315
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Huor
Mon 13 Apr, 2009 15:11

Re: PhpBB3 Smiley Problem
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Smiley Packs can be downloaded nearly everywhere on the net. Its simply just some gifs in the appropriate folders with a little setup in your ACP ;) Use google to find some...
As for the smiley creator - well its a mod. 

And for the image in the textarea. Well that simply can be done by editing your css file. Find the textarea definition inside the css and add the background-image variable with the path where the image is located... 

For now i dont have links for ya (sorry). But with using search engines you should find those stuff as well. Or someone else post it here - or you wait a few hours more than i can post links^^