thanx Dave,
the method seems to work (a little bit difficult for applying, but works).

Only for explain the magic to others:
- open the model where to insert dynamic data normally in the piping edit window of CaesarII --> for example the single SAMPLE.CAESAR II will be exploded/unzipped in more files
- delete (if present) the SAMPLE._7 file
- copy your existent ._7 file in the same folder, and rename it in SAMPLE._7 (same name of the original .CAESAR II file)

if you click now for opening the dynamic editor, the new dynamic data are present.

but Dave, a little click on a IMPORT button should be better for us and (i think) simple to be implemented by Intergraph programmers... don't you think so?