Download this: Hermes_cIOS222_223_installer_3.0_(rev4).zip
Extract / copy it to your apps directory on your SD card.
Start HomeBrew Channel and start the cIOS 222 Installer
Read the warning message and push A
Select IOS249 to perform the install with D-pad left/right and push A
Select to Install Custom IOS 222 and select IOS38 merged with IOS37
Wait for download and installation to complete
Start HomeBrew Channel and start the cIOS 222 Installer again
Select IOS249 to perform the install again
This time select Custom IOS 223 and select merge with IOS38 and IOS37.
In your USB loader, make sure to load with CIOS223 when you're booting the game.