# the next command should give you exactly TWO errors with missing dependencies:
# hda-greyhole and hda-platform (if not, let us know!!)
rpm -Uvh hdactl-4.2.12-1.x86_64.rpm hda-platform-6.2.12-1.noarch.rpm
# this overrides the dependencies:
rpm --nodeps -Uvh hdactl-4.2.12-1.x86_64.rpm hda-platform-6.2.12-1.noarch.rpm
3) Start the installer