Read through this guide
Full hacking guide for 4.2 system menus!!!!
You have probably done most of it. Read though it a few times an refresh your memory on what you have done.
You need ios70patched prior to preloader.
Install with wadmanager using ios249.
If you need a password it is www.wiihacks.com
Ipsa scientia potestas est.
Warning: Piracy is NOT supported. Word your questions carefully.