Important directories when backing up:
My Documents – obvious
Documents and Settings\me\Application Data\Thunderbird – oops, forgot about that!
Documents and Settings\me\Application Data\Mozilla\Firefox – probably should do too
Documents and Settings\me\Application Data\Thunderbird – oops, forgot about that!
Documents and Settings\me\Application Data\Mozilla\Firefox – probably should do too
Knowing is half the battle. G.I. Joe! (And now that I have this knowledge…)