Well, after a few days, I'm not satisfied at all...
What I did : I took 2 pictures of buildings from a high point of view, loaded them into Hugin, set 12~15 "normal" points and entered the results into ASP.
At this step, the results were not acceptable at all, so I manually tuned them within ASP lens correction plugin.
It took about an hour before I could find the result acceptable (it took six times more for the Tokina, see other post).
But, now, I don't like the results at all. And I don't understand why I have to correct the values Hugin has computed. Oughtn't they are OK as is ?
Last week, I tried to calibrate my Nikkor 500mm f/8 Reflex... the values Hugin returned resulted in worse corrected pictures than those not corrected.
Whatever the method I use (Hugin or GML Camera Calibration Toolbox), I can't get good results. There must be something I don't understand at all.
So, be very careful with both the calibration data I posted : don't rely on them. I hope I can post correct values soon.