If you're 371, use the 371_ONLY folder. Copy what's in MS_ROOT to your memory stick root, then enable via recovery.

If you ANY OTHER CUSTOM FIRMWARE(Developed by Dark Alex/M33, Miriam, Wildc*rd, or the one anonymous dude), you'll use the ALL_OTHER_CFW folder. You'll copy what's in the MS_ROOT folder inside that folder to the root of your memory stick.
