Install MacDrive 7.2.5...
How to do it:
1. Extract the MSI from exe using Winrar
2. Edit the MSI to accept windows 7(at LaunchConditions tab... where is something like WindowsNT=600 you put >=600)
http://www.brothersoft.com/easy-msi-editor-70589.html
3. Set compatibility mode for the MSI to Windows Vista.
4. Install normally.
I'm running MacDrive 7.2.5 at Windows 7 64-bit build 7000.
Works perfectly
(i 'heard' that an old installation trick used in Vista64 for activation still works)
Dont install macdrive_7.2.2 or macdrive_7.2.4.... it brokes Widows 7