> Does anyone know where there is a RedHat rpm of the
> latest version?
Mandrake should have a package, but RedHat hasn't yet 
(I could not reach them, unfortunately)

If you can't find any package, ask redhat for it, or 
get the sources, as the installation is quite simple:

- download httrack-3.15.tar.gz in /tmp
- then, type:
cd /tmp
tar xvfz httrack-3.15.tar.gz
cd httrack-3.15
cd src
./configure && make && make install
rm -rf /tmp/httrack-3.15