In case it may help here are the parameters from hts-log.txt:

HTTrack3.33+swf launched on Sat, 26 Mar 2005 23:12:17 at
<http://csszengarden.com/> +*.png +*.gif +*.jpg +*.css +*.js
-ad.doubleclick.net/*

(winhttrack -qiC2%PX0%s%u%I0H0%kf2A25000%f0#f -F
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)" -%F 
-%l "en, en, *" <http://csszengarden.com/> -O
D:\aspiration2\css_zend,D:\aspiration2\css_zend +*.png
+*.gif +*.jpg +*.css +*.js -ad.doubleclick.net/* -%A
php3,php,php2,asp,jsp,pl,cfm,nsf=text/html )