[ConnorMcLeod]

I also have one version to post
More flexible and support ML and formatting.

#if defined _cz_tutor_included
  #endinput
#endif
#define _cz_tutor_included

#pragma reqlib cztutor

enum TutorSounds {
	DefaultTutor,
	FriendDied,
	EnemyDied,
	TaskComplete,
	TutorNoSound
}

enum TutorColors
{
	TutorGreen = 1,
	TutorRed = 2,
	TutorBlue = 4,
	TutorYellow = 8
}

native client_tutor(id, TutorColors:iColor=TutorGreen, TutorSounds:iSound=DefaultTutor, Float:flCloseDelay=8.0, const fmt[], any:...);

PHP Code:

/*    Formatright © 2010, ConnorMcLeod

    This plugin is free software;
    you can redistribute it and/or modify it under the terms of the
    GNU General Public License as published by the Free Software Foundation.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this plugin; if not, write to the
    Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.
*/

#include <amxmodx>

#define VERSION "0.0.1"
#define PLUGIN "TutorText"

#define TASK_OFFSET 1354897

enum TutorSounds {
    DefaultTutor,
    FriendDied,
    EnemyDied,
    TaskComplete,
    TutorNoSound
}

new const g_szTutorSounds[TutorSounds][] = 
{
    "sound/events/tutor_msg.wav", // Yellow, Green
    "sound/events/friend_died.wav", // Red
    "sound/events/enemy_died.wav", // Blue
    "sound/events/task_complete.wav" // Green
}

enum TutorColors ( <<= 1 )
{
    TutorGreen = 1,
    TutorRed,
    TutorBlue,
    TutorYellow
}

new g_iTutorText, g_iTutorClose

public plugin_init()
{
    register_plugin(PLUGIN, VERSION, "ConnorMcLeod")
    g_iTutorText = get_user_msgid("TutorText")
    g_iTutorClose = get_user_msgid("TutorClose")
}

public plugin_natives()
{
    register_library("cztutor")
    register_native("client_tutor", "client_tutor")
}

public plugin_precache()
{
    new szModName[9]
    get_modname(szModName, charsmax(szModName))
    if( !equal(szModName, "czero") )
    {
        set_fail_state("Only works on condition zero")
    }
}

// client_tutor(id, TutorColors:iColor, TutorSounds:iSound, Float:flCloseDelay=8.0, fmt[], any:...)
public client_tutor(iPlugin, iParams)
{
    new id = get_param(1)
    new TutorColors:iColor = TutorColors:get_param(2)
    new TutorSounds:iSound = TutorSounds:get_param(3)
    new Float:flDelay = get_param_f(4)
    new szText[256]
    if( iParams == 5 )
    {
        get_string(5, szText, charsmax(szText))
        Send_TutorText(id, iColor, iSound, flDelay, szText)
    }
    else if( id || iParams == 6 )
    {
        vdformat(szText, charsmax(szText), 5, 6)
        Send_TutorText(id, iColor, iSound, flDelay, szText)
    }
    else // iParams > 6
    {
        new iPlayers[32], iNum
        get_players(iPlayers, iNum, "ch")
        if( !iNum )
        {
            return 0
        }
        new i, j, Array:aStoreML = ArrayCreate(), iMlCount
        for(i=6; i<iParams; i++)
        {
            if( get_param_byref(i) == LANG_PLAYER )
            {
                get_string(i+1, szText, charsmax(szText))
                if( GetLangTransKey(szText) != TransKey_Bad )
                {
                    ArrayPushCell(aStoreML, i++)
                    iMlCount++
                }
            }
        }
        if( !iMlCount )
        {
            vdformat(szText, charsmax(szText), 5, 6)
            Send_TutorText(id, iColor, iSound, flDelay, szText)
        }
        else
        {
            for(i=0; i<iNum; i++)
            {
                id = iPlayers[i]
                for(j=0; j<iMlCount; j++)
                {
                    set_param_byref(ArrayGetCell(aStoreML, j), id)
                }
                vdformat(szText, charsmax(szText), 5, 6)
                Send_TutorText(id, iColor, iSound, flDelay, szText)
            }
        }
        ArrayDestroy(aStoreML)
    }
    return 1
}

Send_TutorText(id, TutorColors:iType, TutorSounds:iSound, Float:flDelay, const szText[])
{
    if( iSound != TutorNoSound )
    {
        client_cmd(id, "spk %s", g_szTutorSounds[iSound])
    }

    message_begin(id ? MSG_ONE_UNRELIABLE : MSG_BROADCAST, g_iTutorText, .player=id)
    write_string(szText)
    write_byte(0)
    write_short(-1) // TutorMessageEventI
    write_short( id && !is_user_alive(id) ) 
    write_short( _:iType )
    message_end()

    id += TASK_OFFSET
    remove_task(id)
    if( flDelay > 0.0 )
    {
        set_task(flDelay, "TutorClose", id)
    }
}

public TutorClose(id)
{
    id -= TASK_OFFSET
    if( id )
    {
        message_begin(MSG_ONE_UNRELIABLE, g_iTutorClose, .player=id)
        message_end()
    }
    else
    {
        new iPlayers[32], iNum
        get_players(iPlayers, iNum, "ch")
        for(new i; i<iNum; i++)
        {
            id = iPlayers[i]
            if( !task_exists(id+TASK_OFFSET) )
            {
                message_begin(MSG_ONE_UNRELIABLE, g_iTutorClose, .player=id)
                message_end()
            }
        }
    }
}