Having trouble understanding script

I downloaded a Perl script to use for an image gallery but am having a hard time understanding it & what I need to do....it says it does'nt work as a CGI & has all these weird things that it says I need to do that I'm not familiar with.

You can see the file here: http://www.nihongo.org/snowhare/uti...mlthumbnail.txt

I also don't understand exactly what it means by this line:

Quote:

---

# If those are already installed on your system, you are good to
# go. If not, you will have to download and install them before
# you can use this utility.

---

Thanks for any help.

Link doesn't work for me, I think it's cut off.

i think it is asking if you have perl installed or cgi installed.