Its been asked for repeatedly but based on the lack of feedback (see thread) I'm guessing its not going to make it back onto the Mikrotik priority list for some time.
If you MUST use the HP I'd suggest the following:
Use the internal USB and put a USB dongle on there - try installing to that with netinstall or similar. I prefer keeping the HP's for our Caches, Radius or billing platforms and deploy other PC appliances for Mikrotik
