[OldDirtyBastard]

do it like this:

pawn Код:

public OnGameModeInit()
{
    //classes
    for (new i = 0; i < 300; i++)
    {
        if (IsValidSkin(i))
        {
            AddPlayerClass(i, 1958.3783, 1343.1572, 15.3746, 269.1425, 0, 0, 0, 0, 0, 0); //Adds all classes.
        }
    }
    return 1;
}

IsValidSkin(skinid)
{
    switch (skinid)
    {
        case 0, 3, 4, 5, 6, 8, 42, 65, 74, 86, 119, 149, 208, 265, 266, 267, 273, 289: { return 0; } //Unavailible classes and classes you dont want.
        default: {return 1;}
    }
    return 1;
}