Don't know if this will help but, my ASPI file says 'wnaspi32.dll' followed by 220.127.116.11 and finally Win32 Nero Aspi Library.
I quite ofter crossflash my DW1650 to a Phillips DVDR1660 and back which works OK.
If you PM me with your email I can send you a copy of the ASPI file or the DW 1650 .CVT files so you can try WinDWflash. (I have firmware BCDC, BCFC & BCHC).
Alternatively you could try this link for the .CVT files however, you will need to register.