First off your english is nearly flawless, no need to apologize. Secondly I am hoping you are somewhat experienced in mod writing as what you ask is exceptionally complex. The action would probably need to start in a dialog option as the default action is to "DO" whatever you aim at, wait here, kill that, sit on that ect. The only real advice I have is to check the Nexus for a Decompiler, Pex i think or maybe its Dex, that will create a source code for you so you can read it, but generally if a mod writer doesnt include the source its because they dont want you peaking. Either way I wish you luck. Sounds like a decent mod.