hydo, I think you should use Digest::MD5 as suggested by ncw---perhaps you can install your perl modules in some area you have write access to, (your home directory, for example) and add that location to @INC?

If management sees Perl modules at work (more reliable, maintainable, and faster-to-ship code) then they may well decide to do something about the terrible system administration problems you seem to have.

Good luck!