If you cannot control the environment on your machine, but you want your code to do something different, I suggest you use a batch file to launch your program. My connection at work is limited by the firewall. I use this batch file called fwrap.bat to run ppm to install modules. Just run "fwrap ppm"
or "fwrap perl script.pl"
and it will and it will setup your environment.
%1 %2 %3 %4 %5 %6 %7 %8 %9
Update the path variable to point to the directory holding the actual Perl executable you want to run.