[plug] dumb Perl Q

[Sol]

I've recently been working with digital photos for the first time and 
having spent several hours changing the resolution of 100s of jpegs I 
realized I'd been doing it wrong. A hunt on the internet helped me come 
across a Perl script that uses Imagemagick to make thumbnails out of 
jpegs a whole directory at a time. The problem is I don't know the first 
thing about how Perl works!
All I need to know though is how to "install" the script. The page gave 
instructions on how to run the script but assumed a knowledge of Perl.
Do I save it in /usr/local/src (Or somewhere else)?
Do I need to compile the source using some sort of compiler (like gcc 
but for perl)?

This really could make things way easy. If only my little, pea brain 
knew how. [:-[]

thanks,
sol