Windows USB Serial driver .INF

[Hp50gFr]

Thanks for the advice AndiGer !
But... the goal is to have a .inf driver without necessity to install anything, just use already windows included 'usbser.sys'. (of course it could be that i then can't use 'standard' HP connectivity kit with this only SerialToUsb .inf)
Looking at the provided link, it will install a HPx9G2k.sys and not use (directly) the usbser.sys.
I think newRPL is using right USB\VID and PID numbers to not have any driver being installed when connecting a HP50g to an USB port on a PC.
Another way to achieve this, would be to 'patch' an HP50G firmware with right USB/VID & PID numbers ?
I will try again the .inf way ...