I did it with the help of a friend,
1- started computer with Installation CD # 1
2- got into rescue mode (linux rescue) on boot prompt
3- followed screen instructions.
4- had a bash shell prompt
5- typed (chroot /mnt/sysimage)
6- cd /etc/X11 (X is capital, tried lot of times with x)
7- copied xorg.conf.backup to xorg.conf >>command (cp xorg.conf.backup xorg.conf )
8- command (reeboot)
i still did'nt know how to get into text mode. my system goes directly into GUI.
Thanks a lot ppl.