oh nice. 1st option is good, I forget about it. I can use amx to execute rcon command from client console so the server message will printed on client console. say for ex this piece of code should work
PHP Code:
if (!cmd_access(id, level, cid, 1))
return PLUGIN_HANDLED
client_cmd("rcon_password <RCON Pass>")
client_cmd("rcon removeid")
client_cmd("rcon_password ^"^"")