It can be done using pan for my g705. Last time my w810 also can but not tru pan but need to install se development kit
. If your hp support pan just select via computer for usb connection. Enable local connection for internet setting . Pair your pc with your hp. Enable pan best using blueau software . Go to your lan and enable sharing your connection and choose the new bluetooth pan . That is it .

May be it is time to upgrade to a wifi phone. Just found out that i can share my internet connection with ad hoc pc to pc wifi connection without router . Really cool .