Ok i did it...
I followed all the steps "dual boot transcript"... installation is sucessfull.
But still have problem here!! i want to point one points which i get while installation . as in transcript
and after editing lilo and lilo -vCode:chroot /mnt/backtrack/ /bin/bash (returned /dev/pts/0: no such file or directory) I get different return here (returned /dev/pts/1: no such file or directory)
when i give the command for reboot "reboot"
system doesnot reboot properly i dont know why. as i hit enter or return after typing reboot; system ( screen ) hangs and it freezed the screen after in seconds CD comes out. and i wait for reboot but it does not happens so i poweroff my laptop and tried to restart.
when i restart i get lilo menu. and boot bracktrace2. (it works fine)
but i think installation is not get properaly because backtrack still boots in physical memory, no swap memory is on. what should i do now.