First, just to be sure, download the Jet 4.0 EA Base project from the Sparx site. It is on the
Resources Page. I think you unpack it and rename it to EABase.EAP, then copy it to your EA installation directory. For safety, rename your existing EABase file first (so you can go back if need be).
[I have already suggested this become the default; Sparx is considering this for the future. You could make your own suggestion if you want - since the Jet 3.51 file was trashing your footers, regardless of how you worked with them - to help Sparx work out the priority of this change.]
Now to the real question; how to get custom text - "something" (as you phrase one of your alternatives) from the model rather than 'canned' text - into the footer?
My guess is that you need a field value based on an EA macro expansion. There are two big questions here. Can this be done at all? And if so, which of the various expansion paradigms would be appropriate here. [EA handles macro expansion in several places, not all the same way. Paolo would be on the soapbox about this being inconsistent; Paolo would be correct.]
All I can suggest is that you look through the help for macros and other field expansion entries, and try each.
[edit]Start with what you were doing before. How were you getting anything - regardless of what characters were being displayed - in to the footer using Jet 3.51?[/edit]
David