[quote]Assuming it's mounted as hda1, that is...[/quote]
How easy would it be to boot up under linux and perform that operation with an NTFS volume as the destination, without having to install other stuff on the hard drive or otherwise mess with things?
Booting to Linux is no problem - you could use one of the many fine boot-CD distros such as Knoppix. The catch is that they'll support NTFS reads with no problem, but writing to NTFS partitions is still considered not quite ready for primetime. Actually, that may be an understatement - NTFS writes under Linux are, IMO, not safe at this point, insofar as there's a chance of corrupting the filesystem if you try. If you have a FAT32 partition that you can copy the image to, that would probably be a safer way to go.