> I grabbed a set of html-pages. P.ex. everything
> below <http://www.example.com/subdir/>. Now I want to
> retrieve all images in img-tags (jp(e)g,png,gif) -
> of course from different img-servers.

Unless you filtered out stuff, you already have images from
www.example.com/subdir/.... (mirror direction default=down only)
If there are others not down or on other servers you can add a filter to get
them +*.jpg +*.png +*.gif
or just check get non-html which will get everything.