qpxtool 0.5 Plextor 716 and simulation on DVD+R

[Stefano Vesa <stefanovesa@tiscali.it>]

Hi.
I've noticed that in qpxtool 0.5 there is an option to allow 
simulation on DVD+R(W) on my Plextor 716.
At this time how I can use this feature? I've tried growisofs with 
-use-the-force-luke=dummy but with no luck. The simulation seems to 
work with DVD-R(W) only.
Any tips?

TIA
Stefano