> . My suggestion is, if possible, pls. provide the codes 
as 
> standard return values so that it would become easier to 
> wrap scripts around httrack.

Err, when there is only one file, this is easy - but what 
if downloading an entire site? A regular mirror will always 
generate a lots of 404's, as websutes are not always "404 
clean", but this is generally harmless for the offline 
browsing.