from the guide:
Originally Posted by johna9999
Loading Backups FAQ:
Cios- you have: These are what run all your backups. You have a few to choose from.
Hermes- cIOS222-v4, cIOS223[37-38]-v4, cIOS224-v5.1
Wanikoko- cIOS247[base-37]-v21d2x4, cIOS248[base-56]v21d2x4, cIOS249[base-38]v21d2x4, cIOS250[base-57]v21d2x4
You have all the current cios needs, so if you have any issue and so and so says use this cios, you have it. You can set these on a per game basis in your loader.
CFG-USBLoader has been set to use cIOS248[base-56]v21d2x4, this should load just about everything for you. But if you have games that need other cios you can use those as well. You can set cios on a per-game basis in the loader if you wish to use others. Legacy app compatibility has been maintained with ios249v21d2x4
So do you have an answer?