[Richie]

Use something like this in OnPlayerText;

pawn Код:

new Rank[20];
    switch(GetPlayerScore(playerid))
    {
        case 0 .. 10: format(Rank, sizeof(Rank),"[Newbie]");
        case 11 .. 20: format(Rank, sizeof(Rank),"[Beginner]");
        //etc..
    }
    new ChatText[128], Name[MAX_PLAYER_NAME];
    GetPlayerName(playerid, Name, MAX_PLAYER_NAME);
    format(ChatText, sizeof(ChatText),"%s %s: %s", Rank, Name, text);
    SendClientMessageToAll(-1, ChatText);

It will show the text you wanted when he talk, but name will be normal in tab list.