How can I tweak the existing Arabic Keyboard on the iPhone 4, 4.2.1?

I work in a language which uses an Arabic alphabet, but the existing Arabic keyboard doesn't have at least 5 of the characters I need (the same token it has a whole slew of characters my language doesn't have either).

How can I re-map the Arabic keyboard so that instead of a ة (U+0629)(on the lower right side of the keyboard) I type my correct ە (U+06D5)?

I would need to do the same for the other characters I 开发者_如何学运维need for my language. I don't need to make a custom keyboard per se, I just need to re-map so I can type my characters.

Thanks.

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i found this very helpful. http://hints.macworld.com/article.php?story=20090725113333249 now i have found the missing arabic letters like ى ء ئ. hope this method can help you with that problem too