nah, didn't work...I kinda figured. I stuck the files in the "My kindle content" folder in my documents folder, and when I loaded kindle for PC, it did show up in "Home"...but when you try to open it, it won't open, telling you to delete and re-download it *facepalm*
*edit*...then I thought I'd get really smart, went to the "Manage My Kindle" and clicked to "download" the book. It gives me the options of which device I want to download it to:
*double facepalm* ...guess it doesn't let you download it outside of the Kindle for PC software.