I've seen a few threads here trying to get this card to work in AP mode. I have tried a few things and the most I can get is to get the card to work in ad-hoc mode. Tried airsnarf and really struggled with getting it to give out IP addresses.

So what do I propose

Well the simplest way is this... Run backtrack via vmware in windows, bridge a connection from windows from a wired connection or wireless but not using the 8187 card unless you have two.

In windows download realtek 8187 UI from the official site and setup an AP,
there you go... simple as that...Not ideal but it is a step until someone can get it working in linux.

edit : or do it the other way round, load windows in backtrack via vmware