Well, Expect seems to be perl only (no C or other code) so it may work by copying, but other stuff can go wrong that the normal installation process does or checks for; for instance, Expect requires IO::Tty and IO::Pty, so it probably won't work unless you've got those modules installed too (including their requirements recursively)

If they're availabe, you should probably use the ppm packages for active state perl. Otherwise, for pure perl modules, you may be able to just install nmake and use that to install from CPAN directly using the CPAN shell.