This is the directory or folder where MSN or Windows Live Messenger custom emoticons are located:
For Windows XP:
C:\Documents and Settings\ [Your user name] \Local Settings\Application Data\Microsoft\Messenger\ [Your Live ID] \ObjectStore\CustomEmoticons
For Windows Vista or Windows 7:
C:\Users\ [Your user name] \AppData\Local\Microsoft\Messenger\ [Your Live ID] \CustomEmoticons
In my case (email removed), it is found in “C:\Users \kahwee \AppData \Local \Microsoft \Messenger \something@example.com \ObjectStore \CustomEmoticons”.
For Mac OS X (Snow Leopard)’s Microsoft Messenger:
/Users/ [Your user name] /Documents/Microsoft User Data/Microsoft Messenger Data/ [Your Live ID] /ObjectStore/CustomEmoticons
In my case, it is found in “/Users /kahwee /Documents /Microsoft User Data /Microsoft Messenger Data /something@example.com /ObjectStore /CustomEmoticons”
You can backup your custom emoticons by copying the directory to your flash drive or something. As far as I know, you cannot transfer Mac OS X’s Microsoft Messenger custom emoticons to your Windows’ Live Messenger and vice versa.