If you are using zencart you can install module called 'easy popualte' which alows easy product updates. We will regulary provide updated file for your to upload.
you can download file csv here by right click --> save target as...All pictures
PS. Amount of products and pictures is different because some products are out of stock, some are new and we dont have pictures yet, or its the same item with different price points (eg. unboxed item, or different chain).