> But if httrack act like this, do you have any idea, why i 
> get so many eshowXX.html pages (with the same html-
source) 
> when the 404 error only refers to the same eshow.asp?> errorid=16 page? 

Look at the hts-cache/new.txt ; and search for all 
occurences of eshowXX.html to see what is the originating 
link (URL field)

Or in other words: Any idea how I can tell 
> > httrack only to create one offline file for all 
eshow.asp?> errorid=16 links? 

Maybe the eshow.asp.. link is relative:
a href=eshow.asp
instead of
a href=/eshow.asp

causing an infinite number of files fetched?