new skinlist = mS_INVALID_LISTID;

public OnGameModeInit()
{
    skinlist = LoadModelSelectionMenu("skins.txt");
    return 1;
}

public OnPlayerModelSelection(playerid, response, listid, modelid)
{
    if(listid == skinlist)
    {
        if(response)
        {
            SendClientMessage(playerid, GREEN, "SERVER: "C_WHITE"Your skin has been set successfully.");
            SetPlayerSkin(playerid, modelid);
            db_update_int(ACCOUNTS_TABLE, modelid);
        }
        else SendClientMessage(playerid, 0xFF0000FF, "You have canceled the skin selection.");
        return 1;
    }
    return 1;
}

public OnPlayerSpawn(playerid)
{
     ShowModelSelectionMenu(playerid, skinlist, "Skin Selection");
     return 1;
}