Iirc, the display name can be changed in the settings file.Im pretty sure GCN controllers are supported since time ago.
I think it must be modified in hex in the Data.rsdk file, i don't know.
4:3 and 240p modes are supported, however you have to modify the Settings.ini file for enable those modes.
4:3 is only set when the Wii video settings is set to 4:3.
240p can only be enabled with a setting in Settings.ini.