Go to the sony site: https://account.sonyentertainmentnetwork.com/pc/login.action then sign in then go to account,
first change your email address on the account then delete your name of the ps3 not the games just the account make sure you cant deactivate video or game first
now make a new account on the ps3.
sign up to playstation network
press exsisting account
use the new email you put in