Step 1: Find the SD card slot on your computer, it will be a very small slot on the front just the size of your sd card. If you don't have one you will need to buy either an internal or external sd card reader.
Step 2: Download the file above, save it to your desktop so you can easily find it again.
Step 3: Download and install 7-zip a free zip opening program which you can find here:
http://www.7-zip.org/download.html Download the very first one on the list, it will redirect you to source forge then your download will begin automatically.
Step 4: Open 7-zip and follow the on screen instructinos to install it on your computer.
Step 5: Find the zip file for the update on your desktop, RIGHT click it, move your mouse over 7-zip and in the menu that now pops up click on extract files.
Step 6: A menu box will now show on your screen, at the top where it says extract to look over to the right and click the small button with three dots on it.
Step 7: A menu will now pop up. Under computer there will be your SD card, select it and choose ok.
Step 8: Click ok down the bottom of the window and the extraction will begin.
Step 9: Remove your SD card from your computer and insert it into your Pleo's belly.
Step 10: Turn on your Pleo and wait as per the instructions in the first post of this thread.