No, your english is right. One large PS file for each screen because creatives do all the work with PS. We have to slice them and crunch the 32MB 300dpi photorealistic file down to a 120kb HTML file with some gifs and jpgs
Nice! I create all my website´s layouts with Photoshop; but I don´t like slices (don´t know why...). I prefer working with several layers: each one for each part of the layout.