Yes, you need both DLLs to be picked up but they obviously cannot have the same name. You can try giving the DLL another name such as d3d11.dll, dinput.dll, dinput8.dll, dsound.dll, ddraw.dll and see whether it loads. If that fails, you can try forcing the loading of that DLL (injection) with ENB Injector
www.enbdev.com/download_injector_generic.htm
. As both DLLs share some code I'm not sure whether that will create some conflicts, it's something crosire would have to answer, or you just try finding it out yourself.