Download the picture you want to RailImages. Once it's there you will click on the picture and right click and the window will pop up. Go to properties. When it gives you the property, copy that whole series of letters /numbers. (The address, URL.) Come back to Trainboard and in this message box you would type.... So it's Thats it.
Also, here is a tutorial for uploading photos to a post. There are a bunch of tutorials under the Support Forum.
If you still need help just let us know and we will walk you through the process. :boy::boy::boy::boy: