Another alternative would be to use perl2exe to so-called compile your perl program into an executable.

I hear a lot of "so, what good does that do in this case"
The fact is that Windows (at least NT and 2k) will run an exe as a screen saver, as long as the exe has been renamed to a .scr extension.

Really, give it a try, rename a copy of cmd.exe to ssmyscreen.scr and hit the screensaver tab of display properties. This is actually pretty scary behaviour. Just for fun one time, rename login.scr to login.old and cmd.exe to login.scr, logout and wait ;->