EADS CASSIDIAN / NOKIA THR 880i Encrypted DMO channels

Does anyone here have some info, tips or guide how to set up DMO channels work in DM-2A, B or C encryption level? I am new with the TPT Tool and don't have any user manual to it, which would help also a lot. So if someone has one could you please share it with me? All I have find out so far is that there is drop down menu in the same place where you setup the channel frequency and that the SCK list have something to do with it as well but I have no idea how to write the encryption key files into the radio in the way they would work properly and if there is still some more programming needed to get the AIE work properly.

So as you may guess all help related to this is more than welcome :) Also if you have the actual help files to TPT (not only the flashing ones) those could help me also since I don't have those.