Step 5: Done!
If, your memory stick has a LED on it like mine, I would suggest putting a piece of electrical tape over it so that it doesn't reveal your secrets. Attach the fake phone jack to the wall, and replace the face plate. If you used a phone box from Radioshack, simply attach it to an inconspicuous spot on the baseboard near your computer.
To access your secret plans, all you do is plug the USB end into your computer and the phone end into your fake phone jack. It should show up as a USB mass storage device.
Congratulations! your plans are now well hidden. Thank you for reading my Instructable; comments are appreciated as usual.