settings for a script?

[Maverickb7]

Hi people...
I'm trying to create a cms to run a site of mine and have come across a problem. I have a file called settings.php that contains a bunch of settings in the following format. I example of how the file looks follows:

[code=php:0]
<?php
$SETTINGS_PATH = "/home/public_html/settings";
$TEMPLATE_PATH = "/home/public_html/templates";
$ATEMPLATE_PATH = "/home/public_html/templates";
$DB_NEWSTAB="newszv";
$LANGUAGE_FILE="en_language";
?>
[/code]

What I would like to know is what the best method would be for editing these settings via http within a admincp. I'm just starting with php so a simple and effective method would be appreciated. If anyone could show me a tutorial or provide me with some code that does this for me that would be great as this is something I would really like to add.