how to modify rom's own input method

[jeaney]

Here is the thing, i got 2 modified rom which are chinese version ,however input method is different . What i want to do is to merge the input method from one to another.

now there is some work i have done.
1. 2 rom were decodeed complete.
2. dumped files were showed on.

but i don.t know which is the input method. (.dll .exe ....)
would u help me out? ?? ?