For simply printing a message to players when they join:

 How's about we try this:

in the function DefaultGame::clientMissionDropReady:
 

centerprint(%client, "Welcome to my server, it is better that the crappy ones.", 10, 3); 


That will show the message to the client who just joined for 10 seconds and it will use 3 lines to show it. 
 

Hope this is what you are looking for man! 
(Not counting a good job and a hot car of course....duhhh!) 
-AZ