According to its manpage, perldoc will search in any directories in the environment variable PERL5LIB. So if you wanted some POD documentation in a Pod directory or a doc directory and some mixed into libraries in lib and other mixed into executables in bin, you could just write a small script that did:

    PERL5LIB=./Pod:./lib:./bin perldoc "$@"
[download]

to tell perldoc to search in those three places.