By this user Geoffcole's question, I have same question to ask... I also got my question as a separate thread.
I have FaderPort1 V2, and I wanted to let it work with Magix Acid or Magix Vegas since both of software have FaderPort Driver in their External Control And Automation option. But it does not work, and I can't add it with FaderPort Driver said device not detected. I set FaderPort V2 to Mackie Control mode, and selected it as Mackie Control device in Acid, it responds but the control mapping is chaotic. I can't find a way to workaround like making FaderPort V2 work in FaderPort Classic mode. And I can't register FaderPort DLL plugin directly.