Ever wonder how your friend turned his PSP into a PDA or a calculator, or even a 3-D modeler? Find out how! (Requires Custom Firmware.)
Step 1: Hooking Up Your PSP.
First, connect your cables to your PSP and computer. Go to Settings --> Usb Connection to connect your PSP. Your computer will detect the PSP and it (should) automatically open the root menu of your PSP.