I have a lot of problems with my phone, and so I have a number of nandroid backups with different sets of overlapping SMS messages saved in them. I've also made a few copies of the data folder when the thing wouldn't boot. I like to have all my SMSes backed up to my Gmail for posterity and searchability, using SMS Backup Plus.
What's the easiest way to recover messages (and maybe other data) from my backups? Is it possible to open or run nandroid backups inside an emulator? Are they in a format that can be extracted to a filesystem, and then take the database files out and merge them with some kind of database tool and then put the merged file on my phone? Would it handle duplicates?