h.sie's or stieblers hardcoded edits will change the fact that no matter what radio messages reduce your speed to 1.
EDIT: Re-read that...looks counter intuitive to what I was trying to say -
They are the only way to get the game to NOT reduce TC x1 when receiving a radio message.
You can cruise along at 8k TC and check your 50 messages later.
I, however think I am going to the lite mod myself or maybe a self - modified version. Currently playing as U-51, I hate to see messages from U-51 to U-51
I recently discovered these mods, "good sauce!"