It important to note that there are two sets of files .kl and .kcm, as long as they match it will work. Ie is the .kl says key 214 is BUTTON_R2, then your .kcm needs to list BUTTON_R2 as ?. Some of the origonal files have it listed as QEUCHAR, which is fine as long as they are both listed that way.
Bottom line make sure you are changing the right file. If you dont want to use adb simply extract the file to your sdcard then cut and copy with your fav root explorer app. Make sure you first mount the /system as writable. Permissions should be fine but they need they need to be 644 and or rw- r-- r--. Reboot and it should work. Thats the process I did to make mine work.
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