Not really sure if it's supported under 64 bit OS's since it only lists 32 bit in the documentation/requirements here: http://downloads.vmware.com/d/details/disk_mount_utility_5_5_driver_tools/JSpiZGR0cGJkd2U=
But, doing a little more research yielded this page: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2016 With links to this page (supports Windows 7): http://www.vmware.com/support/developer/vddk/ which could allow you to use the tool under Windows 7. You'll need to test it under the Windows 7 x64 OS to see if it will install/run though.
Thanks for the tip!
I installed the Virtual Disk SDK from
which contains a copy of vmware-mount and the install worked on Windows 7. This allowed me to run vmware-mount.exe and map the vmdk file to a drive letter.