I am just coming into a new web design role and so far I can find no central repository of all images as used on the website. I have previously, at some point in the design process, inserted all design images (global buttons, layout images, background gradients etc) into a PNG file - sometimes multiple PNG files if warranted. (Please note that I am not talking about content images (such as photos that would be used in an article), just the images that are part of the design.)
Before I go about the usual task of compiling all images into a PSD/PNG, just to see if there are other, more manageable ways.
My question here is, how do you store all of the images that you use in a website? Do you have a central repository (PSD/PNG) file for all of your buttons, all of your gradients or is that unnecessary?