ok.. after reading the tutorial here in the site and navigating the forums, I
think the following should do it:
httrack <http://inventorspot.com> -O /tmp/inventorspot -r2 -* +*.gif +*.jpg
+*.png +*.css +*.js +*.tif +*.bmp +*.swf -q

I will use this to run in non-attended mode.. so did I miss anything?