Tested and Working. Anything done to your console is at your own RISK!
This is for people stuck on 4.2 with no cIOS. Make sure your sd card is formatted to FAT32 or FAT16 and download
[Only Registered Members May View Links| Click here to register] or
[Only Registered Members May View Links| Click here to register], unzip it and put it on the root of your sd card.
Before you start, you will need to install Homebrew Channel and bootmii as an IOS or boot2 using the new bannerbomb, Smash Stack or the Indiana Pwns Exploit. The exploits aren't in the pack you just downloaded.
1) After installing Homebrew Channel, Rename the tbrboot.dol on your sd card to boot.dol and load the Channel and press home and load bootmii, this will load Trucha Bug Restorer, press B to choose No IOS Reload. Go to Downgrade IOS15 and press A to downgrade. Everytime it says "Load IOS from SD Card" press A on the wiimote.
b) Load BootMii Again (if bootmii doesn't work, attempt from homebrew), run Trucha Bug Restorer and choose IOS15 and press A. Choose IOS36 Menu. In there use these settings:
Install IOS to slot (36)
Hash Check (trucha) Yes
ES_Identify Yes
NAND Permissions Yes
Then Press A on Install Patched IOS36. Again Press A when it says "load IOS from SD Card"
c) Again, re-run Trucha Bug Restorer from bootmii and choose IOS36 and press A. Then choose restore IOS15. Again, when it says "Load IOS from SD Card, Press A.
2)Re-run Homebrew Channel and Load Any Title Deleter DB (not from bootmii). If you get any errors just press A. Then select System Titles and press A. Then, select IOS222 and press A to delete. Do the same for IOS223, IOS249 and IOS250.
3) Re-run Homebrew Channel and load cIOS38-rev14 Installer (not from bootmii). Choose IOS36 and press A and then choose Network Install (requires wi-fi) and press A.
cIOS38 (IOS249) Installed.
4) Load up homebrew, then Dop-IOS v8 (not from bootmii) Keep pressing right until you find IOS53 and press A to select yes to install and Sig Hash Check. Do the same for IOS55 and IOS70. Next press home to return to homebrew channel.
5) OPTIONAL - Hermes cIOS Installer
a) Load Hermes cIOS installer from homebrew channel
b) Select IOS249 for install, select Install custom IOS222 and use IOS38.
c) Restart app, select custom IOS223 and merge IOS38 with IOS37.
6) Get a USB Loader or NeoGamma R7 and now you can play backups on 4.2
Credit to: Team Twizzers, Tona, Marc, Comex, Hermes & Waninkoko
NOTE
-Any Title Deleter may not always ask you to select an IOS.
If this method didn't work,
[Only Registered Members May View Links| Click here to register] should do it.
If this did or did not work please leave feedback.