Since it looks like your are using a *nix type system, you can set the PERL5LIB variable within your .profile to the directory that you want to install modules in
Update: Plus, you follow the suggestion that vek mentions and you should be all set.
TStanley
-------- It is God's job to forgive Osama Bin Laden. It is our job to arrange the meeting -- General Norman Schwartzkopf