What you can do is to add a filter to forbide and 
accept what you want, such as
-* +www.foo.com/bar/*.* +*.gif

But, again, the "mirror X levels outside" is not YET 
implemented, that is:
- Downloading a website
- Downloading X levels outside this website

In your case you would like to set X to 1 and add an 
additional "Get NON html files near a link"

This will be for the 3.01, if I manage to have the 
3.00 final ready one day!!