in reply to hide code
The answer to this depends on who you are trying to hide the source code from. If you are talking about delivering an application for internal company use and you just want to keep the monkeys from screwing with it, you can use a few obfuscation techniques as discussed by others.
If you need to deploy this code to paying customers, your best bet is going to be to use perlcc and go with binaries.
Either way, you'll have to decide if that's enough protection because in the end, an experienced perl person can reverse what you've done to hide the code. Or reverse it enough to dink with it.
I used to drive a Heisenbergmobile, but every time I looked at the speedometer, I got lost.