How to Transfer from OE to TBP?

I would like to be able to use Thunderbird Portable on a flash drive. I assume that is workable.

I use Outlook express (I know I should change). Can I transfer all my outlook express emails and contacts to a flash drive if I have Thunderbird Portable?

If so, how do you do it?

Thanks

SB

[Topic clarified by mod Tim]
was: Newbie question