I would have replaced the internal card with this: http://www.oxfordtec.com/uk/MiniPCI-...duct_info.html
If your messing about with your own stuff then its really all you need. It works with the mad-wifi drivers in BT3 great, you'll see alot of the tutorials here are demonstrated using same or similar chipsets.
Have you checked to make sure your using the right device the zydas in my laptop didn't support injection but would still show up in config.
Just looked at the wiki and it claims to use atheros chipset so you should be using madwifi drivers, in which case if your trying to crack wep this guide could be followed almost exactly: http://s32.photobucket.com/player.sw...fs=1&os=1&ap=1