The transfer of photos is a chore I am also trying to tackle. So far, I have found out how to attach linked thumbnail images at the end of a posting (that means, they would not show up within the text of an imported thread, because an imported thread technically will be depicted as a single article), or original size images within the text (by using the IMG code e.g., or HTML, if you have enabled it), but have not found a way to pepper smaller images within the text itself.
Carcano
Carcano