> [...] I have a ZIP file whose contents are in turn 4 ZIP
> files named LISP.{A,B,C,D}, [...]
Eh? What makes the "LISP.{A,B,C,D}" files "ZIP files"?
As usual, copy+paste of actual command output (like, say,
"unzip -l whatever.zip", might be more useful than your
(vague) description of what's where.