Hey, I'm not sure if everyone knows about this mod or not, but its called 'Firestorm Over Kaurava/Kronus'. Basically it tries to make playing Dawn of War just like playing tabletop, or atleast as close as you can get considering. It also uses the codex's and has ton more units. I think it turned out really good, and its definately worth checking out.
[url]http://www.moddb.com/mods/dawn-of-warhammer-40k-firestorm-over-kronus[/url]