There were a number of issues in the sample overlays pack provided. Some images were not 96DPI (which NMJToolbox2 requires) which would have potentially caused the images to be overlaid incorrectly. Also some of the images were incomplete sets (eg the ratings stars). I have now corrected the DPI on all images and added the missing images from the ratings folders.
Simply download the pack and extract over your existing overlays folder. You will of course have to copy/replace the ones you use from the sub folders to the Overlays folder.