Images in clan tags

[YourBuddyBill]

I've seen people using images in their clan tags before, things like skulls and whatnot. I know that clan tags normally only allow for four characters, I bypassed this by editing the prefs file. However, even afterwards, I cannot get images to show up in my clan tags, nor can I get them to show up in chat. I'm using the Skull CI for testing purposes. Can anyone help me out here?

[Ad Bot]

[Greek2me]

It probably has to be set server-side.

[Swollow]

server sided you can do in the console
FindClientByName("Name").clanprefix = "Your Prefix";
FindClientByName("Name").clansuffix = "Your Suffix";