How to install emulator application on psp slim. requirements: a.emulator. b.psp slim with cfw 3.71 m33 or higher. steps: 1.source out an emulator in the internet e.g. psp-hacks.com (in this case,emulator chosen is NesterJ NES Emulator 1.11 RM). 2.go to psp-hacks.com main page,then click on PSP downloads,then click on Homebrews,then Emulators, then Nintendo,and finally click on NesterJ NES emulator 1.11 RM. 3.source the emulator. 4.for psp slim,you must use applications/emulators that are 3.XX fw otherwise,it will not run on the slim.1.50 fw is for fat psp's. 5.to know that it's 3.XX and therefore for slim use,an emulator or application has basically one main folder upon extraction via winrar to your desktop,unlike 1.50 that have two main folders (one of the folders has a percent sign on it usually). 6.many emulators and applications will also indicate whether they are for slim or fat use. 7.connect the pc to your psp through usb connection and go to the root of the memory stick. 8.now copy the NESTERJ_1_11_RM folder from your pc desktop to the GAME folder in your memory stick like this - F:\PSP\GAME. 9.at this point you can load a legally acquired rom game to your emulator by placing it on the ROM subfolder found inside the NESTERJ_1_11_RM folder. 10.disconnect usb connection,then go to the game submenu on your psp,click on the NesterJ emulator application you just installed to run it,choose and click on the ROM/ folder to load the rom and there you go.