when exporting journal from iphoto to pc, how do I maintain the file names?

I first imported a bunch of files from my PC to iphoto on the iPad. I then used iPhoto to create journals. Then, I 'Shared' the folder to 'iTunes', which I could then recieve from my iTunes on my pc from the 'File Sharing' section. However, when I save the files to the desktop, the filenames have all changed. I need to maintain the file names of the photos that I originally had before transfering them to iPhoto on the iPad. How do I do this?