I have a mod_perl script that is pre-loaded into Apache. Say...script.pl

I was considering adding some code to identify who was running the script.:

http://www.whatever.com/script.pl/accounting
http://www.whatever.com/script.pl/engineering
[download]

Then the script could pull that info with a line like:
($junk,$source) = split (/\//, $ENV{'PATH_INFO'});

The Question:
Does adding pieces to the PATH affect the fact that the script is pre-loaded (with NO pieces added)? Do I have to pre-load each instance?