I have found the sources for bsdinstall in usr.sbin/ directory in the source tree; now I see a reference in that script to some /usr/libexec/bsdinstall; as far as I understand, it is a reference to an already existing script on some floppy disk, for example, that is used for installation; so the question is how do I find this script in the source tree? I have not found anything close to bsdinstall in libexec/ directory...