Heh. Maybe instead of propagating a duplicate bit of POD, you should pull the common 'dirty hack' code out of each module and put it into a common Utilities module. Then you could document it once (or even fix it once) and use it in all your other modules. Of course, this would require you to edit each of the existing modules, which may be what you're trying to avoid doing. :)

It doesn't really answer your question, but that is what I would do.

Alternatively you could use an embedded hyperlink (L<name>) to point at your external POD.