Start here
http://www.learncpp.com/
Come back in a few years when you've mastered the language and then we can talk about editing the sources
If you want to edit the scripts?
Start here then
http://www.lua.org/manual/5.1/
Come back in a few months when you've mastered the language and then we can talk about editing the scripts
Not interested in source or scripts?
You want to work on the aac & db?
Start here
http://php.net/docs.php
When you mastered above
Go here
http://dev.mysql.com/doc/refman/5.6/en/index.html
Come back in a few years when you've mastered those 2 languages and then we can talk about editing the the aac & db
Your welcome