In case you can't even connect to an AP, I would give the ndiswrapper a try, to see if you can make it work without using any hacking related tools first, just to check whether; Will your drivers work (with or without ndiswrapper) on Linux? Yes or no
In this case, it looks like you may be able to capture on Linux, but packet injection, seems unlikely unless there's a custom fix, where the first step is: Find out which model, chipset, etc., you have, then google that and append: "linux fix" or similar.
If you don't have proper drivers, forget about packet injection. (Aka drivers does matter when it comes to Linux, so take it one step at a time, and when you can connect to an AP, try airodump-ng mon0 or whatever device is configured for monitoring.)
Alternatively, get one of those USB-devices that has builtin Wifi, and try that in BackTrack. You will most likely discover with the most well known of these, that at least packet capturing and association with AP's, will work right away.