John, yes, you have a different situation than I have. The environment variable method may work best for you. I just installed Citrus Perl 5.16 and in trying to run a wxPerl screen capture script I found on Perl Monks, a required module couldn't be found in the "standard" @INC paths. After locating the module several levels deeper in the directory structure, I used the use lib to point to it. As I learn more, I may have to change plans also. I'm looking at putting commands into .profile to set things up at login.