printBoth vignettes (Building Layout and Interior Layout) are multiple solutions problems. Using one program and background plan you can develop many solutions. For example, I encourage you to practice NCARB problem 5 times in lieu of downloading 5 alternative problems and solving each once. You can develop flexibility and better design skills that way.
You mention additional practice problems. I can assume that you practice some already. Unfortunately I don’t know which ones you have. Everyone has access to NCARB problems and you can download additional problems by clicking on the class that you attended and scrolling to the bottom of the page. You need to be logged in order to see the attachments with downloadable files.