you can always use the Nero aspi layer with EAC only, by putting the following file in your EAC directory (you do NOT have to put it in your Windows system directory):
Put that inside your EAC directory and select EAC Options / Interface / Installed external Aspi interface.
Then restart EAC.
Now you should be able to use Nero ASPI in EAC and what ever ASPI you want in other programs.
Please make note however that you are using same ASPI versions inside your system directory and do NOT have ASAPI installed at the same time, as it can confuse some devices (ASAPI, not ASPI, is made by VOB).