John, the reason that the forum likes thumbnails is because some people don't know how to resize images so that they are under 100 kb. If the images are in a higher resolution (over 100 kb), it is extremely difficult and time consuming for members to view pictures, who have a slower connection to the internet. With the thumbnails, anyone can download the pictures quickly. Any pictures that I post I resize before I upload them to imageshack, they are resized from 3.5 MB to about 50 kb or so, depending on the data in the picture.
If the images are under 100 kb, then you can use imageshack and click on the window that is below your picture in that program, it says "hotlinks to forum 1". Then copy and paste as you would for thumbnails. The pictures will be in full size. Also at the same time in that hotlink to forum 1 window I unclick the box that says "show details". So many people don't properly resize the pictures to a compatible size for ease of uploading, that is why thumbnails is suggested. HOpe this helps. If you need, I have a document that I typed that explains indepth both sequence of picture posting. Beautiful day in our great life. Cindi