Originally Posted by ShinySide

then once they are on the root of your sd card (root meaning not in a folder) turn the phone of and while holding the send key and volume up key tap the power. You will then go into clockwork recovery.

Go to "wipe data/factory reset" and wipe it, then to wipe cache partition and wipe it, then to advanced and select wipe dalvik cache and wipe it. Then go to mounts and storage and format everythinng except the SD card. If you format the sd card it will erase everything on your card.