macos - How do I restore Windows 7 from a System Image to a Boot Camp partition without formatting?

I had a 70GB Boot Camp partition on my iMac that I wanted to increase the size of, so after creating a system image (.vhd) on an external FW drive of the Boot Camp partition using Windows Backup and Restore, I removed the Boot Camp partition from within OS X and re-created one that is now 140GB.

When I go to restore the system image using the Windows 7 installation disc or the repair disc, it says that when restoring the image, the entire [physical?] disk is going to be erased and formatted so that the image can be restored to it. (I don't see any options to choose just a partition!)

I've considered that there may be a command line utility on the Windows 7 install disc to restore the VHD to the partition, but can't find any documentation for such. Is there a cost-free way to just restore the system image backup to the new partition while preserving the OSX partition?

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EDIT:

Basically what I am saying is that when installing Windows 7, there is an option to install to a specific partition on the physical disk, but when restoring, I do not see that option...

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UPDATE: (bounty)

I am still looking for a way to restore a VHD image to an NTFS formatted partition on a hard drive. Specifically a boot camp partition on a Mac.

I really don't understand why Windows won't allow this, although it allows installing to a partition...