It could be a good idea, depending on the size of the sticker. Id say in the limited seconds you have in a burnover it wouldn't be any help, but when your spending time on the back of the truck driving around you will all ways have it there to remind you of the steps.
This also may sound abit harsh but its not a hard thing to remember if you do proper training on it. The thing that some people get caught out on is that when they practice it, they only practice it doing the same role ie crew, driver, officer. For people that could find themselves in all roles, they should practice all roles.