I have 3 problems with my installed backtrack 3

1.- No sound
2.- When i'm start backtrack, i need to do this
$ cp /etc/X11/xorg.conf-vesa /etc/X11/xorg.conf
it's not a real problem, i can live with those.

3.- I can't install the driver for my wireless (realtek rtl8187b), but when i do lsusb, that's show me Bus 006 Device 002: ID 0bda:8197 Realtek Semiconductor Corp.

I have Ubuntu installed, and works great, but with Backtrack doesn't

anyone who have the solution for this?? also, another question about bt3.... i don't have linux-headers, that's normal?? (/usr/src/linux-headers-'uname -r')