what weight do you put in for alignment?

I'm getting 2 new rear tires from Tire Rack, got couple alignment questions.

1) Should I do alignment at my stealership or at tire installer from Tire Rack?

I saw the following quoted along with alignment specs.

Normal weight loaded position:
Each front seat = 150 lbs.
Rear seat (center) = 150 lbs.
Trunk = 46 lbs.
Fuel Tank = Full tank

Click to expand...

2) I was wondering if the above weight is official or
should I do alignment with what I typically have in my car
i.e. 145 lbs front...

what weight do you put in for alignment?