you have created 6 threads asking this same question, because of that the other threads were removed.
posting many duplicate threads is not allowed here, please make a thread for your question and just wait for an answer, DO NOT keep creating a new threads for the same question just because you didn't get a response or the answers you were looking for.
if no one responds, it is because they do not understand the question in the way it was asked or they just do not know the answer.
if no one responds to your question then add another post in the same thread explaining it better or asking the question in a different way to help people understand what type of help you need. it also helps to ask simple questions one at a time and not combine many questions into one so they are easier to answer and understand. this community will be able to help you do just about anything you want to do with the game.
I edited your thread title to include your question as it always should and I also moved your thread over to the sh4 mod section where modding questions will get the most help.
if you have a new question about a new subject then its fine to create a new thread for it but please only do so if you are switching to a different subject matter. if you are asking a new question about the same changes you want to mod (such as flak guns), then please keep your questions contained within the same thread.
if you look here
http://www.subsim.com/radioroom/showthread.php?t=155786 there is a lot of info to help you with just about any type of modding you want to do and then you can be better prepared to ask any specific questions such as where the files are found for things and how to change them.