Since I'm on FreeBSD and was interested to get this up and running I had 2 options to install WHD:
Seems Solaris/Linux package may be no longer available but the second option still works.
In any case you may need to set:
RedHat packages of WHD are distributed in GZip'ed format (*.rpm.gz) so to use above instruction you need to decompress the package, for example by running:
gzip -d -c WHD-package.rpm.gz > WHD-package.rpm
and then using rpm2cpio.