The ability to add a preference setting in the keyboard menu that would affect auto correction was discoverd by “Zhivago” in this thread. I’m providing a modified .plist file to work with 1.1.2 firmware. You can’t use older keyboard.plist files without reediting them. I will show you two methods for performing this hack, an easy method and a more moderately difficult method.

read it here hacktheiphoneitouch.blogspot