Still think I only got thumbnails? If so, why wouldn't they open?
Yes, because you wrote "I can right click on the thumbnail and copy/paste or save but that is only the thumbnail, not the file."
But it does open,
it's a thumbnail. It is linked to the new photo, but because the new photo was not included in the email the link is broken and XP just keeps looking and not finding so it just sits and spins. Now if your computer and the Mac were networked together the photo might show up, but they are not.
If you truly think you have everything, perhaps a different viewer will work. I have never used the native Windows .jpg viewer or Microsoft Paint in XP, so I don't know if it has any Mac related
bugs features. Heck, you can just drag any .jpg into a blank Firefox window to view it.