hello before i observed that on running Backtrack 4 pre-final the keypad and touchpad freezed.. the fix is below...

1) While booting from dvd or memory stick click TAB for advanced option. there u add
locale=en_US i8042.reset

2)After hdd install please edit /boot/grub/menu.lst and add 'locale=en_US i8042.reset' at end of the kernel line.

3)Wireless card compatible

4) wireless card capable of packet injection but patch required even if kernel is greater than 2.6.x.x.

thanks to everyone at remote-exploit channel for helping me out without whom i wouldn't have even able to move a inch forward..