"the "difficult part" is the installation on many computers."

This wasn't part of your question, and is a seperate issue to how 'simple' the task is to achieve. However you don't have to do any of this. You can use pp which will package up your code, modules etc into an executable you can then run on other machines, without having to install perl or anything else. Perhaps consider using a config file for parameters.

See Wisdom about "packaging" or transporting Perl apps or super search for other threads on the subject of distributing applications.

Update: read the OP again and updated as above.