Gnarly Installation stuff

You can find all correctly intalled and documented perl modules with

perldoc perlmodlib

perldoc perllocal

The former shows the initially installed ones, the latter the locally installed ones.
There may be "incorrectly" installed modules (where someone just dropped the .pm file into your @INC path, so you can use the module, but have no documentation). You can find all modules via:

find `perl -e 'print "@INC"'` -name '*.pm' -print

(See also the perlmodlib manpage.)