you need to do the following:
1. After you mount the game image, copy all the files to you hard drive in one folder for example NFSMW.
2. Open the \NFSMW\Autorun folder..and then open the file autorun.cfg with Notepad.
3. Look for the parameter DirectXVersion=9.0c and change the 9.0c to 0 and save the file.
4. Run the Setup from your hard drive folder and ENJOY!!
I hope this helps...