I now have a copy of the Warhammer Fantasy Battle rules as well as the Chaos Daemons army book. Looking at my models I realized that I'll need a battle standard bearer so this weekend I chose to convert my Herald of Nurgle to a Herald of Nurgle with a battle standard. It was pretty easy. I drilled a hole in the top of the skull on the staff. Then I took a beastmen standard and made it... Nurgly. Finally I put the two together.
I like the results. Khorne is jealous of the skulls this guy has. Slaanesh gets STDs just looking at him. An Tzeentch... well the Changer of Ways is now the Changer of his Drawers.
Next step, finish up my Fiends of Slaanesh and add a command to my Plaguebearers.