cg_hudChatPosition is in [mod folder]players/config_mp.cfg
As for the position of iprintln, when you change the chat position, iprintln will move with it.
However, the obituary notice (you killed/were killed by) is controlled by the engine, and without libcod it cannot be changed (it can be changed in COD4, because they kindly put all such things into hud.menu, and you can change where the notices are made on the screen).