adding another dialect for phrases

Hello all,

I am trying to figure out the proper procedure to be able to activate a new dialect. I have found tables T002, T002x...I see the dialect I want in T002X, so do I simply add the corresponding entry into T002? I know that T002X contains the code point hexadecimal value and that I need to convert it to the one character unicode, but is that how it is done? A manual addition to T002 or is there a more formal process?