Thanks for the nice comment about the site. Glad you found us!
As far as PPC, here is what's in the readme file, but I can't remember if I had to manage the books and library from the desktop app or by just adding the book file to a directory.
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Follow these procedures for installing books:
1. Connect your PocketPC device to your host computer.
(Note: We assume that you have already set up communications
between your host computer and your PocketPC device.)
2. Turn on your PocketPC device.
3. Run SETUP.EXE on the host computer.
4. Select one of the books from the list presented and click on the 'Ok'
button. If there are no books listed, or the book you want is not
listed, use the 'Browse...' button to locate a directory with books.
5. The setup program will automatically install the eReader software
and a shortcut to it in the 'Start\Programs' menu.
6. You will be prompted to unlock your new book on the device when
you open it from the Book\Open menu item.
7. To run the eReader software, launch it from the shortcut
'Start\Programs\eReader'. The operation of the PocketPC version
of the eReader is the same as the Palm handhelds version.