Overriding default libs

[xajin24]

Hi perlmonks community, I do not have permissions to install modules on my machine so I am looking for a round-about way of doing it. Currently I downloaded the desired module from CPAN and installed it in a local directory. The current machine I am working on is running perl 5.8.8 and has the 1.07 version of threads and I need it to be 1.6+. I've tried  use lib /path/ as well as  BEGIN{} to try to force my perl script to use the lib I need. The problem is that whenever I try to force the use of my lib, it is still referring to the default one in /usr/lib64/perl5/5.8.8/...

!/usr/bin/perl
use lib "/tmp/custom_module/";
use warnings;
use threads;       
print $INC{'threads.pm'}."<<<< Source of threads\n";