Hacking S60 3rd edition firmware - Unlimited permissions for untrusted midlets

By default, Nokia S60 3rd Edition phones install midlets mostly with "oneshot" or "session" permissions, which force user to accept permission everytime a network connection is made or file is opened. If you don't have signing key (which costs $$$), you cannot even modify these permissions, because the phone only allows "ask everytime" option for e.g. file write.