mod_perl is an Apache/Perl integration module. You usually consult the webserver admin about using it. I wouldn't recommend installing it (even if you had rights) if you don't know what you're doing :) Go for a less complex method of doing what you want. If you feel comfortable with perl, look into mod_perl and give this a try.
Anyway, if the admin asks, the settings defined above go in the apache config file (like httpd.conf) and the module goes in the Apache subdir in your Perl directory (I don't mean cgi-bin !). I do assume your admin has a clue and you have a VERY good reason to do this :)
... Quidquid perl dictum sit, altum viditur.