Your scenario is described in the FAQ here: 
<http://www.httrack.com/html/faq.html#QM12>

> I created a project in WinHTTrack. With WinHTTrack
> it is easier to set all download parameters.
> Everything works perfectly.
> 
> Now I would like to do:
> 
> 1) Move my project to UNIX platform (Mac OS). I am
> planning to launch HTTrack by crontab (update
> mirror)
> 
> I know only, that I have to modify the doit.log. Can
> I ask for more details of how to do it?> 
> 2) In the project directory I have two
> sub-directories (hts-cache and sub-directory with
> mirror webpage). I want to change the location of
> this directory. Could you give me any hint how to
> set it?>