Using 4.2U, I'm getting a lot of frozen games and black screen on current games. Saw this on the USB Loader site and wondered if it is still good info before I start changing cIOSs. NOTES: -You can have cIOS36/38 and cIOS222/223 installed at the same time. Every version has its own (dis)advantages. -If your global cIOS is 249 and you set an individual game's cIOS to 222/223, it will not always work. On the other hand, if you set your global boot to 222 and set an individual boot to 249, it should work fine. -If you change your global boot cIOS you need to completely exit out of the loader and restart it in order for the change to take effect. If you do not do this you will get a black screen. It is also necessary to delete your GXgamesettings.cfg file from your config folder on your SD/USB to prevent any setting conflicts since anything in GXgamesettings.cfg overrides the GXglobal.cfg file. -Setting your global boot to 222 rev 3(installed as 37 merge 36) or 222 rev 4(installed as 38 merge 37) and setting your global 002fix to ANTI will result in 99% compatibility with no glitching/stuttering on IN REGION games. For OUT OF REGION games you need to also set the Video Mode to AUTOPATCH. The 1% non-compatibility is from the "please insert disc" games. However, those games are fully playable by simply inserting any dvd into your drive (I just stick a blank one in) OR by loading those specific games with cIOS 249 rev 12 or higher. -Make sure you always delete the 00000001 folder from the root of your SD/USB before doing any network installation of cIOS 222/223.