All apps are able to read that file since it contains global settings such as the region, video mode, parental settings, wiimote configs etc. For this reason LibOGC already contains functions to decrypt and parse it.damysteryman said:All it needs to do is decrypt isfs:/title/00000001/00000002/data/setting.txt and read the serial number that is stored in it.
MMM may need certain priveleges in order to access setting.txt though...
...unless it's running under cIOS249