I use Jethro's diff trick to examine an applications' interactions with a database when I'm trying to wrap my head around what it does on the backend and relate that to what I do in the browser. pg_dump mydb > before.sql; pg_dump mydb > after.sql; diff before.sql after.sql. This trick came in quite handy when working on LedgerSMB::API.

I would suggest using sudo updatedb; locate SomeModule.pm to discern where your site perl libraries are. I would think that if the hardware and OS remain the same, you could likely tarball your site lib and move it over en-masse.

-- Hugh