change permission file (just) at run time

hello,
I need to ask how i can modify permission.config file at run time? from behind code
Because i need to change valuefor advsecuritymethod !! from 1 to 0 in some case..
if that not possible <img src='https://asprunner.com/forums/file.php?topicimage=1&fieldname=question&id=10902&image=1&table=forumtopics' class='bbc_emoticon' alt=':o' />
how i can change the path (file name) if i create two permission.config files ? <img src='https://asprunner.com/forums/file.php?topicimage=1&fieldname=question&id=10902&image=2&table=forumtopics' class='bbc_emoticon' alt=':blink:' />

(switch between two file) <img src='https://asprunner.com/forums/file.php?topicimage=1&fieldname=question&id=10902&image=3&table=forumtopics' class='bbcemoticon' alt='<<' />
thanks & regards