Things to try:
in reply to Re^2: ModPerl IIS
in thread ModPerl IIS
Look for the use... lines at the top of the scripts. You might well be running Apache::Registry, which lets you run CGI programs with little or no modifications.
Look under your Start menu and see if Apache is installed there. mod_perl doesn't run under IIS.
Talk to whoever gave you this assignment. Someone must have written this code. Someone must know something about the configuration.
You came here for help. Keep asking. Ignore anyone who is pointlessly hostile.