Things You'll Need
Instructions
Enable your PSP's wireless mode. Do this by flipping the switch on the side of the PSP into the "on" position. This will allow Wi-Fi transmission.
Load the game that you want to share. Simply put the game in the UMD slot, and select it from the "Games" menu on the cross media bar.
Go to the game sharing option and begin broadcasting data from your PSP. This is generally located in the "Multiplayer" section of the game, but if you are unsure as to where this option is located, check your game's manual.
On the other PSP go to the game sharing option in the "Games" area of the cross media bar and put it in game sharing mode. It should detect the other PSP's broadcast of the game, and will begin downloading the title momentarily. Once the download has finished you will be able to play the game together.