How to Put the Buttons and Shell into Place?

You're almost there! Try not to jump ahead and insert the battery just yet. Honestly, it is all downhill from here. The figure in previous post provides you with an illustration of where to insert the final screws.

Here's how to wrap things up:

1. If you took the left and right trigger buttons out, now is the time to put them back in.
2. Insert the circuit ribbon connected to the LCD buttons into its slot on the right side of the PSP.
3. Lay the button strip onto the LCD and click it into place.
4. Carefully clean off any smudges on the LCD using a soft cloth.
5. Lay the PSP top onto the device and apply pressure to snap it into place. Be sure that the bottom button strip lines up.
6. Flip the PSP over onto its back and insert screws 1, 2, 3, 4, 5, 6, and 7.
7. Finally, insert the Memory Stick and battery/cover back into the PSP.