PSP ROM

i just downloaded NFS Most Wanted. It’s a .cso file so i extracted it with PSP compressor. after extracting i got an .iso file. i extracted that too. now i can see two objects. a folder named “PSP_GAME” and file “UMD_DATA.bin”. in the folder PSP_GAME there are some files and folders. param.sfo, two .png files and two folders >> SYSDIR and USRDIR. in USDIR there are many game files like tracks, audio etc. in SYSDIR there is EBOOT.bin and BOOT.bin and folder named UPDATE. in update folder there are three files DATA.bin, EBOOT.bin and PARAM.sfo. what should i do to play the game????i can’t find any exe file. Plz help. i’m desparate.
i just downloaded NFS Most Wanted. It’s a .cso file so i extracted it with PSP compressor. after extracting i got an .iso file. i extracted that too. now i can see two objects. a folder named “PSP_GAME” and file “UMD_DATA.bin”. in the folder PSP_GAME there are some files and folders. param.sfo, two .png files and two folders >> SYSDIR and USRDIR. in USDIR there are many game files like tracks, audio etc. in SYSDIR there is EBOOT.bin and BOOT.bin and folder named UPDATE. in update folder there are three files DATA.bin, EBOOT.bin and PARAM.sfo. what should i do to play the game????i can’t find any exe file. Plz help. i’m desparate.
i have downloaded an emulator but still can’t play it. plz give me a detailed instruction of how to play that game with emulator.