I have simply made a trailer folder and a subtrailer folder by year. For example, in the trailer folder, i have a trailer 80's folder, and 1981 subfolder, 1982 subfolder, etc, in it. The sequence titled "1981" take on the folder "trailer 1981" at random, that is so simple. The only thing that demand a little work is to make a sequence for each year. But all sequence are made on the same model so it's very easy and quick to adapt them by just changing the trailer folder on the trailer bumper, making the same for the commercial folder too. The only thing I can't do, is to delete a sequence... I don't find how to make it. If someone can tell me ? Thanks.