Since the refrenced website is gone, I looked for a cached version. Google was no good, but the Way Back Machine had a snapshot: http://web.archive.org/web/20090526231704/http://www.xcelfiles.com/ImageToXL.html
Unfortunately, they didn't have the file. But they had the exact filename, so a little more searching and I found this:
https://github.com/mandreko/ImageToExcel which looks like a .NET solution that you'd have to build.
Maybe a little more searching and you could find the actual executable if you don't have Visual Studio.
(By the way, all the standard disclaimers on the above links: I don't know what they are, don't endorse them, didn't try any of the downloads, use at own risk, etc...)
Let us know if you find it!