in reply to Best way to manage package versions?
Having multiple programmers change files without supervision and logging is a recipe for sure disaster.
I recommend using any kind of source code control. My favourite is git (not GitHub, which is just some website), but there are many others, such as simple file copying, or rcs, or cvs.
Having source control also makes releases easy - you can conveniently wind time back to find the exact module versions active for a given point in time. The Perl developers use git to do just that.