Hi Papa G. I don't know how to do it using the thumbnails and figured there's got to be a way. Maybe using captions for the pics, but have never tried it. Just more to keep up with. lol
This is what I do though. In your description box, there's an icon at the top, where the text size and all that is. You can click that to enter a picture, then text, then another picture and on and on as much as you want.
When I want to use the thumbnails, I put it right onto the picture using photo software of choice... irfanview, photoshop, newest I've found and love is gimp, from the bay's photo/html board. It and irfanview are free downloads if ya don't already have them.
Hope that helps. Good luck.