>     httrack <http://howstuffworks.com> -O /tmp/howstuffworks
> -s0 -F "Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US;
> rv:1.1) Gecko/20020826"

Well, it looks good.

> Also, can httrack save a config file on OS X so I don't 
have
> to do this over and over again?
A default configuration file ? 
You can use the ~/.httrackrc file, such as:

# ~/.httrackrc configuration file
set user-agent "Mozilla/5.0 (Windows; U; Windows NT 5.0; en-
US; rv:1.1) Gecko/20020826"
set path ~/websites/#