Phat DAC install

I too found that raspi-blacklist.conf file was empty, and etc/modules only had i2C-dev listed - this was on a fresh Jessie install (I think the new overlay method of configuration does not need blacklist.conf).
I found that just creating the asound.conf file and adding the dtoverlay=hifiberry-dac to the /boot/config.txt file was enough to allow the DAC to be used, although the only way I found of selecting it was through VLC player (it wasn't selectable from the desktop volume control). Hope this helps (a bit!)