I'm surprised there isn't a thread on this already! If you are unaware how plugins on a PSP works you will need a PSP running CFW. Most plugins go in the seplugins folder found at the root of the memory stick. Here are my favourite plugins so far: Music - with this plugin you can listen to your own music during games like custom soundtracks on X360/PS3! You'll have to turn down in-game volume in the options of games though. PopsLoader - an essential if you want to play PSX games on your PSP! FastPower - with this you can power off your PSP just by pressing L and R triggers from the XMB and reboot the PSP by pressing L and Start. Fusa ScreenShoot - this allows you to take screenshots of anything that shows on your PSPs screen. It allows you to use your own custom button combo to take shots and you can use a custom folder path for the shots to go. CXMB - this plugin allows you to use custom themes (.ctf) very conveniently. Other means of using custom themes include flashing F0 which is part of the PSPs flash memory where the XMB data is stored. Many prefer not to mess with this as it is rather inconvenient and could brick your PSP. Note: certain themes only work depending on what CFW you are running. Post yours and I might add it to the list!