The original ASP Photo Gallery v3 code was written in 2002.
ASP Photo Gallery v3 added thumbnails to ASP Photo Gallery v2. I’ve removed the v3 code and article from this web site. It was a complete hack that required Classic ASP components that didn’t create quality thumbnails.
It was not built to handle the much larger image sizes cameras produce today. Therefore I believe it is rarely practical to store and manipulate images on a shared web host, especially using Classic ASP image components. Use a dedicated company like SmugMug or Flickr and then access their APIs to build custom galleries.
For a simple gallery using the SmugMug RSS feed, read my tutorial Displaying a SmugMug Gallery with ASP.NET