If the platforms are CPAN-able, then autobundle!!! This is really cool, used it the other day to upgrade my perl to 5.6 and get everything installed right. On production machine,
perl -MCPAN -e shell
At the prompt, type autobundle.
Go into ~user/.cpan/Bundle and get Snapshot_2001_date_here_00.pm and copy it into the same dir on production machine. Fire up CPAN on production box, hit install Bundle::Snapshot_2001_date_here_00, and go get lunch. CPAN will install every module that was in the standard @INC dirs into the production source tree, all nice and pretty. Probably best to keep an eye on it, and run it through a couple times to get rid of failed dependancies, as I think it just tries to install everything in alphabetical order. One long run through and a couple quick ones to pick up the stragglers should be sufficient.

Enjoy!

Trinary