Im not sure i found the best way to do it, but it works and currently i do not see a better way (maybe epoch devs can shed some light on how this would be done better or perhaps integrate this?), i havent seen anything about killmessages anywhere and i guess some servers might have been waiting for something like this for a bit now, so here it is:
with this installed, you can easily setup the following types of killmessages:
sideChat //note that sideChat only shows if more than one player is on the server (not that it matters much)
globalChat
systemChat
titleText
cutText
hint
hintSilent
dynamictext
obviusly you can switch any of these on or off (in settings.sqf) and besides this, it can add a custom channel to your server with the name and/or colour you specify at the top of the settings file ...
you can also swith on/off if you want it to show killfeed from players killed by ai or simmular (alltho sappers will currently show as error: no vehicle, as there is no killer left to check).
to install this, all you need to do is put all files in a folder called "addons\messages" in your mission, edit settings as you like and add this line:
[] execVM "addons\messages\init.sqf";
to the very bottom of your init.sqf if that does not work, try at the top.
if you have A3EAI it might be a good idea to move this line:
#include "A3EAI_Client\A3EAI_initclient.sqf";
to the very bottom of your init.
(you can also edit the second line of settings.sqf to match your prefered folder structure)
Link:
https://github.com/Halvhjearne/killfeed
as requested i have now added a study body function to this.
here is a picture of how the killfeeds look:
(note that the red custom chat is now unsupported by me)