[Miguel]

First off, this code is wrong:

pawn Код:

public TrashMasterCar(vehicleid)
{
    if(vehicleid == 408)
    {
        return 1;
    }
    return 1; // it will always return 1
}

It's meant to be:

pawn Код:

public TrashMasterCar(vehicleid)
{
    if(vehicleid == 408) return 1; // if vehicleid is 408 return 1 and exit the function
    return 0; // if not return 0 and exit the function
}

Second of all, use SetPlayerRaceCheckpoint and use the callback OnPlayerEnterRaceCheckpoint.