Instructions
Plug the USB cable for your PSP into the rectangular USB slot on your computer. You will find it on the side of a laptop or on the rear of a computer tower unit.
Connect the other end of the cable into the connection slot found on your PSP
Turn on your computer and wait for the desktop to load up.
Click on the "Start" button on the desktop taskbar and select "Computer" from the right side of the desktop start menu.
Select "PSP" from the list of file options on the menu found on the left side of the "Computer" folder.
Double-click on the "Books" folder. Scroll through the list of books on your PSP to find the comic you would like to delete.
Right-click on the comic file with your mouse and select "Delete" from the drop-down menu. Select "Yes" to confirm the deletion.