Did some research and found that backtrack 3 had realtek network drivers by default and when i m logged into XP and if i goto device manager ... in network adapter i see following:
"Atheros AR8121/AR8113/AR8114 PCI0E Ethernet Controller
Ralink 802.11n Wireless LAN Card"
so whats the best way to get the drivers
....its 6 hours and m still looking around.