Something unclear about Pokertracker / PAHUD

[minSim]

There is something about some PokerTracker or PAHUD stats I don't completely get. I hope someone can help me out:

VPIP - voluntarily put money in the pot preflop
The times (%) a player puts money in the pot preflop, not counting the obliged blinds (and antes). These are either raises or calls, right?

PFR - preflop raise
Is this the times (%) the player raises for the flop?
Is this the times a player raised preflop dived by the times he had a decision preflop?
What is the effect of the following scenario's on the number:
We raise preflop, fold to the 3-bet.
We raise preflop, call the 3-bet.
We raise preflop, 4-bet the 3-bet.

Or is PFR the times the player goes to the flop as the preflop raiser?

Cold call preflop
This one at least exists in PAHUD, not sure about PT, but probably.
Is this the limp %?
Or calling a preflop raise %?

Call preflop raise
I guess limping isn't included in this one?
So this is calling a preflop raise?
What about calling a preflop 3-bet after we put in the raise/2-bet?
What about calling a 3-bet after we have not put in a bet/raise until that point?

[ryang]

trying using the search feature.