Having just downloaded the VM package, I find the same issue.
This seems to be long-standing problem with the build routine. The configure script shows:
checking where .elc files should go... $(prefix)/lib/xemacs/site-packages/lisp/vm
checking where pixmaps should go... $(prefix)/lib/vm
checking which options to pass on to (X)Emacs... -batch -no-autoloads -l $(srcdir)/vm-build.el
checking where the TeXinfo docs should go... ${datarootdir}/info
The pixmaps are not going to site-packages/etc and the info is not going to site-packages/info.
Having just downloaded the VM package, I find the same issue.
This seems to be long-standing problem with the build routine. The configure script shows:
checking where .elc files should go... $(prefix) /lib/xemacs/ site-packages/ lisp/vm /vm-build. el
checking where pixmaps should go... $(prefix)/lib/vm
checking which options to pass on to (X)Emacs... -batch -no-autoloads -l $(srcdir)
checking where the TeXinfo docs should go... ${datarootdir}/info
The pixmaps are not going to site-packages/etc and the info is not going to site-packages/info.
I don't know if this ever worked!