To install, you will need to look at the back of the speaker and find two small locks that hold the speakers in place. Once you release the lockbars from the PSPs base, you will be able to slide your PSP easily into the sound system without any force. Once the PSP is set into its base, you can simply move the speakers back into position and lock them in place using the lockbars. You will notice that the speakers will fit snug around the PSP and so there will be little chance for the device to fall out of the sound system.