Just do Lysander, or a regular captain. You can deck him out in Terminator armour if you feel like doing a bit of conversion. Command Squads aren't really worth it. Or you can take any other HQs, like Vulkan, paint him in IF colors, and give him a new name while still using his rules. That's what ima do later on.
---------- Post added 2013-02-12 at 06:37 PM ----------
Found it:
"Red: "Red wunz go fasta'!"
Orange: ? (I've seen grot armies this color.)
Yellow: Explosives painted yellow are more... explody.
Green: ? (I would think there'd be one, but I haven't seen any.)
Blue: Lucky.
Purple: Sneaky/cunning. (I'm not quite sure about this one. Can anyone confirm with a source? Mine was less than trustworthy.)
Black: 'Ard. (As with the purple, my source is somewhat dubious.)"