HOW TO REMOVE INFECTIONS ON MW2 PS3

SOME FAG WITH A MOD MENU MESSED UP MY MW2 EVERY TIME I GO IN ANY GAME IT KEEPS A BLACK SCREEN BUT I STILL SEE THE CROSSHAIRS.
ALSO THE TITLES LIKE CREATE A CLASS,PRIVATE MATCH,FIND MATCH. IT HAS OTHER WRITING OVER IT. IF YOU WANT ILL POST SCREENIES SO YOU CAN HELP ME TAKE THIS OFF

screenshots would help.