//Your enums:
enum PlayerData
{
    VIPRANK,
};
new pInfo[MAX_PLAYERS][PlayerData];//defining enum with pinfo

CMD:setvip(playerid, params[])//your command
{
    if(IsPlayerAdmin(playerid))//checking if you are admin
    {
        new id, viplevel;//making new vars
        if(!sscanf(params, "ui", id, viplevel)//formating the input parameters in the command
        {
            pInfo[id][VIPRANK] = viplevel; //setting the player's VIP Level.
        }
    }
    return 1;
}