1. Desolder the original memory slot

There are two ways to do this I recommend hot air, but you can also use pliers 

Hot Air

Add plenty of kapton tape to the surrounding components if you use hot air

Pliers 

Carefully cut the shielding, and then remove it and the black plastic

Apply flux to the gold fingers and remove them. These pads are the most important, so be gentle!

Clean off the original solder using solder wick. Once again, be gentle as to not pull up any pads

Installing the board (V1)

Align the new board to the pads and solder it to the pads. Use flux to help. Make sure to also solder to the pads around the board as this will help anchor the flex to the device

Installing the board (V1.2)

Anchor one pad first. Then align the pins.

Folding the board

Fold the board over and align it to the stand off pads

Micro SD

Up to 128gb has been tested, however the bigger the card the slower the PSP will wake from sleep.

V1: To remove the micro SD from the slot, its best to use tweezers. 

Please note, that due to the installation of the reader, you need to reboot your PSP after you reinsert the card