vacuum leak / exhaust leak questions

[stateofidleness]

gentlemen,
I have a noticeable exhaust leak on the driver's side. best way to describe the sound would be equivalent to putting a playing card in a bicycle tire to make it "motorocycle" like. almost exact same sound.

I have a "lean" issue at the moment that tends to set off a CEL every time I step on it and drive it aggressively. Code 1128 (bank 1-3 yada yada)

Here's my questions:
1. would fixing the exhaust leak fix the issue with the lean condition (which I assume is caused by a vacuum leak or the exhaust)
2. if my mechanic does a smoke test, will that find vacuum leaks as well?
3. does anyone have a REALLY good picture of the whole exhaust system so I can see where all the pipes meet. hard to do without a lift

thanks