I'm sorry Mr BrycE, but currently I'm not doing any LUA/LUB translation
Hmm this one isn't really a translation, but towards more into client hexing, this time is "How to disable Navigation Button":
Open your hex editor, find "5C6E617669676174696F6E5F696E746572666163655C62746E5F4E617669676174696F6E"
Then, to disable the button, you just need to edit 1 pair of the digit into something else.
For example, the first pair --> 5F6E617669676174696F6E5F696E746572666163655C62746E5F4E617669676174696F6E
Run your client and voila, the Navigation button is now gone!