I’m using a custom theme, and I recently redesigned my site making my main content well much wider. I upload images at 1024px wide, and had wordpress automatically resizing them to 500px for my large size. With my new design my main content area & large images are 640px wide. So, I’m wondering if there is a way to automatically resize my old 1024px images to create a 640px version which my blog is now set to use. Either a plugin, hook or even a script is ok, I really can’t afford the time to have to reupload all my images, so any ideas are greatly appreciated.