Well basically I'm just messing around and been trying to add the flakvierling, 88 flak cannon, and the 105 Howitzer as normal buildables for the engineers and pioneers. That's the only thing I haven't been able to do yet.
But other then that I've changed the Tiger Ace to the Tiger II or as everyone knows it the King Tiger only I've increased its 88mm KwK 42 gun damage. Even managed to add the M26E4 or Super Pershing to the Allies side and I increased its T51E1 90 mm gun damage also. Even though both tanks are using the Tiger Ace and regular pershing models for now. But as soon as those mod tools from relic come out i'll be able to do more.
P.S. Special Thanks to Corsix, Soldier of Death, Provac, and everyone else who has helped me get started and get a basic understanding of modding.