So, I took a different approach. Since the frame also supports memory cards, I got a 2GB SD card for my mom and will train her to leave the write-protect tab in place EXCEPT for when she's actually putting photos on the card. While the card is in the frame, the write-protect tab should be engaged thereby protecting the card from the frame. The frame can read photos off the card but can't write to the card.
We'll see how that goes.
Peace...