DISM32

DISM32 (from Andy Pavlin) converts VMS .EXE files back into Macro-32.
It works with most any VMS image, even drivers.
Read the documents; sometimes (esp. with drivers) you need to
edit the symbol table to redefine sections of addresses as code
by declaring their starts to be entry points, and re-run DISM32
iteratively until all is disassembled.

[Librarian's note: the .EXE was built at my site from these
sources.]