For that reason a card or page metaphor might be good. The user would simply flip back and forth between cards as required. Some items of information are optional. For items such as these maybe a little checkbox could be added. The user could then check off if he or she wants to include, say, a copyright notice or other optional item.
Graphics are a problem.
Basically, it is possible to write code so that the user could paste in a picture and have that picture turned into a GIF, but it's very complicated and fiddly to do the necessary conversions. On top of all that lots of people are going to supply really low-quality awful pictures. I've included the code for a sample GIF in the template below, but the actual document produced by the program should not include that code. The services the organization offers. CITY - City name.