If you have worked on Commerce Server 2002 then you have probably come across the Adventure Works Catalog which is shipped as a sample in the SDK. However, one common difficulty is in finding the images for the corresponding products in the catalog after you have imported the catalog. Well - though it is in the Help file as well (as most answers seem to be), here it is as well in case you ever wondered about it:
"To get the images for the Adventure Works catalog, unpack the Catalog Sitelet, which is located in the same SDK directory as the Adventure Works catalog. Under the International Retail Site \images folder, create a folder named Catalog, and copy the images to that folder."