in reply to Push local lib paths to @INC array
If your application has many modules and many scripts lets say 100, instead adding these lines in each and every file and model class, you can export simply in command prompt while running the script.
In linux terminal export PERL5LIB=/home/gubendran/dashboard/trunk/lib/
This will work till you close the terminal. This avoid adding code in each and every script and you can change the library path anytime.