Spark Messenger is a great open source messenger for internal and external usage, in combination with OpenFire Server.
Because the integrated smileys and icons seem a bit outdated, I created an IconSet generator which uses the much more beautiful emoticons from EmojiOne.
Project is also available on Github.
Could this be updated for 4.0 license?
They’re updated now to 4.5.
How can I make and add custom images?
(1) how would I need to alter the plist file
(2) how would/if I need to alter the thumb file
Does the image have to be a certain size?
you need to edit the plist on notepad or similar and you can change the images but you need rename corretly to make effect