I am not sure if the whole idea of making each account an admin account will work, but I have another solution.
What if I created a batch file that you could place on the root folder of your camera? When the batch file is ran, it would detect which user account is being used and then copy the pictures to the appropriate location. If you want to do this, then you need to give a good explanation of the folders on your camera, where the pictures are located, and the drive letter.