CMD:setscore(playerid, params[])
{
    new playername[MAX_PLAYER_NAME], sendtoname[MAX_PLAYER_NAME], targetid, value;
    GetPlayerName(playerid, playername, sizeof(playername));
    GetPlayerName(targetid, sendtoname, sizeof(sendtoname));
    if(sscanf(params, "dd", targetid, value))
    {
        return SendClientMessage(playerid, -1, "/setscore [targetid] [score]");
    }
    if(IsPlayerConnected(targetid))
    {
        PlayerInfo[targetid][cKills] = value; // to update it you use PlayerInfo[targetid][cKills] = PlayerInfo[targetid][cKills] + value; // or you use += value.
        //save player score function here/ or update
        new string[64];
        format(string, sizeof(string), "You've set %s score to %d", sendtoname, value);
        SendClientMessage(playerid, -1, string);
        format(string, sizeof(string), "%s has set your score to %d", playername, value);
        SendClientMessage(targetid, -1, string);
        return 1;
    }
    return 1;
}