Manipulating files from different changesets

[Imad A. Ferzli]

Hello list,

I am new to mercurial and still experimenting.

I have a question regarding viewing and manipulating files in different 
changesets of a repository. A specific example would be something like this:

The current head/tip of the repository looks like:

changeset:  5:53a46fa3a296
branch:    My_Branch 
tag:          tip
user:        ferzli
date:        Sun May 20 16:29:53 2007 -0400
summary:     Common trunk

A previous changeset is:

changeset:   1:b4e0de952359
user:        ferzli
date:        Fri May 18 16:56:53 2007 -0400
summary:     Added figs to rep

I would like to copy a file foo.txt from the earlier changest b4e0de952359
to the current working directory withouth the rest of the files from the 
earlier changest.
What's the way to do this?

Thanks