Currently, I am working on writing a detailed tutorial on how to use it.
You just input:
-a white layer whereever you want your road to be, all white road must be on one layer (I will call it "white")
-Another layer directly above it (I will call it "black")
-The "white" layer must be called Layer 1, and it must be just one step up from the BACKGROUND layer
-The "black" layer must be called Layer 2, and it must be just one step up from the "white" layer
-The "black" layer need not even contain anything; it's used in the templates, but you can leave it blank if you're working on your own project.
It sounds confusing, but once you have the hang of it, you'll be cranking out tons of textures.
Furthermore, all aspects (road lines, lightened area in the middle, road itself, etc.) of the road will be on separate layers when the action finishes, so you can make easy changes any time. For example, you might want a drag race on dirt, with white chalk lines to guide the trucks. Just give it a dirt background (background layer), plot out the course, set the action to it, and delete the concrete and the white in the middle.