You can remove the echelon intro yourself too. The echelon selfboot guide is pretty much all over the net and it just happens to use DOA2 LE as an example. Follow its instructions and the game will run on Chankast, intro and all......at half the speed since it's not 100% fully emulated yet. Graphics and sound work perfectly though.

I didn't try it on NullDC to see how it runs there