I just got a new laptop running Vista so I wanted to backup and transfer all my Outlook signatures from my old XP laptop. Both are running Outlook 2007.
Outlook 2007 Signature file locations in Windows Vista and XP:
(C:\Documents and Settings\
From that directory, just copy everything to your new computer.
I also wanted to transfer my POP3 account settings, but as of Outlook 2007 you can no longer do that 🙁 Don’t ask me why Microsoft decided to remove this feature. There seems to be various workarounds and 3rd party tools but I chose to just enter my 10 POP3 accounts all over again.