Things You'll Need
Instructions
Insert your memory stick into the USB drive of your computer.
Load your photo editing software on your computer.
Open the image you want to convert in the photo editing software.
Click on the option to "Resize" your image.
Resize the image to 160 pixels by 120 pixels (160 x 120).
Save the file by clicking the option to "Save As."
Name your file as you save it.
Pull the drop down menu for file types and select .THM.
Select the memory stick as the device you want to save the file on, and then click "Save."
Insert the memory stick into your PSP.
Turn on your PSP and select the USB drive as the upload source.
Upload the image to your PSP.