Can someone explain in lamens terms how exactly the fpr is suppose to work accroding to the diagram above. I think the reason why I am having such a hard time understanding this install is because I don't quite understand the in depth function of the fpr. I know its suppose to raise pressure but how? It's partially vacume controlled rite? And a line comes off the fuel line goes from the fuel rail(fuel rail side near timing belt) and then a return line is going from the fpr back to the tank. What is this return line doing? How does the computer now to raise fuel pressure? I'm more confused than I thought or I am missing one critical piece of information

Jsupertran- thanks for the comment too.. My goal is to have a clean looking 2g just like yours.. I'll have a hahn fmic in a few months.