Where is this script?

[GamerDeMTA]

Where's the script of /me command?

[myonlake]

/me command is an internal command of MTA

[codeluaeveryday]

You can modify the me command using onPlayerChat:

addEventHandler('onPlayerChat', getRootElement(), 
function(msg, msgType) 
    if msgType == 1 then 
        cancelEvent() 
        outputChatBox('(ME) '..msg, getRootElement, 100, 200, 100) -- do what evah here 
    end 
end )