> I´m using the Windows version. How can I use the -K4 
> option.

Just add it after all URLs (in the URL box) - like in:
www.foo.com -K4

> Question. This will leave all URL untouched? Or just 
> form and so on?
All URLs. I see what you are trying to do - copying 
directly asp pages after downloading, so that it can 
work.. ah.. this is a very specific issue

The best way is to make a post-download script (easy 
on un*x platforms), like in:

for i in `find ./ -type f -name "*.html"`; do
  cat $i | sed -e 's/www.foo.com\/bar.asp/bar.asp/gi' 
> __tmp
  mv $i __tmp
done

But this is way too specific to add in on the option 
list..