I’m using a fat PSP for this lil’ tutorial. The only difference I can see from using a PSP slim is the button presses (X-O) so there’s not much troubleshooting at hand.

Step 1: Plug in your PSP to your computer/laptop using a USB cable.

Step 2: Go to Settings > USB Connection

Step 3: Open/Browse your memory stick drive from your computer. Copy the PSP wallpaper you just downloaded and paste it into the Picture folder. After that, safely unplug your PSP/memory stick drive.

Step 4: Go to Photo > Memory Stick

Step 5: Choose and View the image you want to use as your wallpaper

Step 6: Press the Triangle button and choose “Set as Wallpaper”

Step 7: Confim your replacement of PSP wallpaper. That’s it!