What exactly does functions.php control?
Obviously, by its name, I infer that it controls certain
functions of the board, but are there certain instances where a hack MUST have an addition made to functions.php?
Are there parts of functions.php that can be re-used (ie, referenced by hacks that the original routines weren't written for) to enable certain functions?
What's the difference between this and global.php? (seriously!

)
Am I showing how stoopid I am by all these questions?
I think if beginners such as myself can learn what particular files control, then the easier we will find it to make additions around and within them
I thankyou for your patience in helping to bend my learning curve