Instructions
Download the DevHook v.044 Installer. (See Resources)
Hook up your PSP to your computer with a USB cord.
Open the Installer that you started downloading.
Complete the steps given in the instructions on your screen.
Disconnect your PSP from the computer.
Go into the "Memory Stick" menu on your PSP.
Open up the DevHook v.044 program and it is now ready to use.