Moving Firefox and Thunderbird from XP to Win 7

I am getting a new Win 7 PC and passing my old XP over to my wife (for the time being, after her laptop crapped out). My questions are:
Are there stable, reliable 64 bit versions of Firefox and Thunderbird?
How do I copy my profiles from FF and TB to a Win 7 PC from XP in the simplest way possible? Specifically, how do I copy all my email folders from TB?

 

FF and TB 32bit work just fine in 64bit systems. The only 64bit version of FF is in alpha and does not support Flash.

 

Moving Thunderbird http://support.mozillamessaging.com/en-US/kb/Profiles

Moving Firefox http://support.mozilla.com/en-US/kb...arks+and+settings?s=move+to+new+computer&as=s

Hope it helps.

 

rsinfo, thanks.
I used MozBackup to do the job. It simplified it a lot, but it wasn't perfect, but the transfer was smoother than I thought,