If I were you I would seriously consider editing that post away, because that is not a topic we can discuss and still use WH mods. The question left unasked in this case is far safer and better for all concerned.
Panpiper: It's great that you're learning the ropes of pixel artistry. I've always heard good things about GIMP although I don't use it myself. Regarding your sprite, its size seems reasonable for something as large and powerful as a greater daemon. Nevertheless, you are right to worry about using GW images in that way and Sombre is correct. We are better off not getting into uncertain legal territory in that way. We're much safer simply drawing -inspiration- from GW imagery and fiction and creating our own materials from scratch however true-to-form they may end up being. I too would recommend removing the legal vocabulary from your above post and probably taking that attachment down just in case.
For those who are watching, my work on the adventure version continues. It is no quick task altering the better part of 215 provinces, but much progress is being made. I am considering releasing the adventure map in two degrees of difficulty by simply doubling the number of defenders for extra-challenging play in a harder version. This seems appropriate as the independent province strength setting has no effect on hard-coded indy defenders like those you will find throughout the adventure map.
I was just too impatient to play Chaos it would seem and spent twelve hours putting together my own take on a chaos race mod. It is not complete, at the moment missing all summoned demon types and the requisite spells (I hope to get to this). Also, most of the graphics are lifted from native, though the majority are reasonably appropriate. I expect Valandil will ultimately put together something rather different and his mod will supplant this one. This is meant to help Valandil with inspiration and maybe he can copy/paste parts of it. That plus it gives us something to play with in the mean time while he works on finishing his mod.
Check out Chaos Undivided in Mod thread- WH hordes of chaos.
I'll do you the entire Dark Elf nation with all the heroes and a bunch of new spells if you'll agree to a bunch of new mod commands and a fix on the modding limits for the next patch. Possibly by bribing JK with cake, I leave that part up to you