For the circular button, set your foreground color to white and background to a very dark version of what you want your inlay button to be. Flood fill with a Sunburst gradient set to Horizontal 30, Vertical 30. For the rectangular button, flood fill with the color you want your button to be. To make these screws, follow steps 1-8 above. Add a new layer.
Flood fill with gray.
Apply the cutout filter with shadow color black, blur 3, offset 1,1. Apply the drop shadow with shadow color white, blur 1, offset 1,1. Right 45 degrees with All Layers unselected.