if you still need it:
stock PlayerName(playerid)
{
new target_name[MAX_PLAYER_NAME];
GetPlayerName(playerid,target_name,MAX_PLAYER_NAME);
return target_name;
}
public OnPlayerConnect(playerid)
{
new string[128];
format(string, sizeof(string), "%s has joined the server with sampcac." PlayerName(playerid));
if (CAC_GetStatus(playerid))
SendClientMessageToAll(-1, string);
return 1;
}