I had same problem with Senao SL-2511CD card (same chipset). I found the following way to load right (Hostap) drivers.
1. Boot Backtrack 2.0 final with your zcom card inserted
2. Type in a console window: airmon-ng
This command shoud list your wifi cards, drivers loaded and their mode. It will probably say that you have orinoco module loaded
3. eject your wifi card (physically remove it from a slot)
4. type the following commands:
modeprobe -r orinico_cs (removes orinoco module)
modeprobe hostap
modprobe hostap_cs (loads hostap module)
5. insert your zcom card back into a slot.
6. type airmon-ng again (it should say that prism hostap module is loaded)
It works in my case. I have not tried injection yet but I think it should work with right module loaded. Please post your feedback after you check injection.



