[Help] NPC scripting

[bond]

Hello everyone...well i having trouble making custom npc quest...i want to make the quest npc or npc give item to player only give item per 1 user....how to make it??? can u tell me??

this is my npc script for giving new player item...but i would like to limit it..is it possible??

prontera.gat,164,167,5    script    Blackrose Gift    61,{
    mes "[Blackrose Gift]";
    mes "I worked myself to death trying to fulfill your ridiculous expectations for items!";
    mes "Now that I've finally found the formula for the perfect headgear, I'm willing to share my time and talents";
    next;
    mes "You need to fullfill this requirement!";
    mes "Zeny 6 million";
    next;
    mes "Were' not done yet sweety...";
    mes "Im a big fan of dolls, so you need to bring me these cuties";
    mes "1 Poring Doll - a Poring drop";
    next;
    mes "Finally, i worked hard to make these Items for my master with all the mentioned items above...";
    mes "Please include exta 4 million zeny for my efforts."; 
    next;
    mes "[Blackrose Gift]";
    mes ". . . . . .";
    mes "Are you ready for me to make this special item?";
    next;
    menu "Sure am!",-,"These requirements are unfathomable!",LUnfathomable;

        mes "[BlackROSE SANTA]";
        if(countitem(741) < 1 || Zeny < 10000000) goto LNotEnough;
        delitem 741,1;
        set Zeny,Zeny-10000000;
        mes "Wow!  You are brave indeed!";
        getitem 2357,1; //armor
        getitem 2421,1; //shoes
        getitem 4047,1; //ghostring card
        getitem 4054,1; //angeling card
        getitem 2524,1; //garment
        getitem 30013,1; //wings
        getitem 30024,1; //headgear
        mes ". . . . .";
        mes "Enjoy being God of BlackROSE Ragnarok!";
        close;

        LNotEnough:
            mes ". . . . .";
            mes ". . .I'm sorry .. You don't have enough money and items ..";
            mes "I can't afford to make this if you don't bring all materials needed.  Please understand this is to benefit heroes such as yourself!";
            close;

    LUnfathomable:
        mes ". . . . .";
        mes "What I had to go through was more unfathomable..";
        mes "If you succeed in getting these items, you will have incredible strength!";
        close;
}

[MentaL]

[Idola The Witty]

There you go.
http://bosseslair.no-ip.org/Blackrose.txt

[bond]

thank you Mr.Idola The Witty....