http://forum.httrack.com/readmsg/22061/22038/index.html
> > Orginal url:
> > index.php?PHPSESSID=ijik080123u0j0u1j00&act=idx
> > After
> > index.php?act=idx
> 
> You can use the user defined structure + hide query
> string to get a similar affect:
> 
> %h%p/%n%[act:_act-:::].%t would generate
> index_act-idx.html
> 
> <http://httrack.kauler.com/help/User-defined_structure>

I have gotten an error. :( Here's the error:
<http://i37.tinypic.com/22ywq8.jpg>