Adagio Poster Flyer Template : GraphicRiver | 283.4 MB
Layered PSD | 2625 px x 3375 px (8.5" x 11" with .25" bleeds) | CMYK | 300 DPI

The PSD file is very well organised, with color coded groups and layers named appropriately. The main folders that will require most customisation are highlighted in different colors.