How to restore GRUB ver.2 in Ubuntu 9.10, u can follow this step..
1. boot your PC or laptop with Ubuntu Live CD 9.10
2. Mount your partition with Ubuntu installed inside.
3. copy addres of your partition ubuntu installed on nautilus address bar.
4. run this command in terminal
$ sudo grub-setup -d /media/xxxx/boot/grub/ -m /media/xxxx/boot/grub/device.map /dev/sda
5. xxxx is your label of your partition ubuntu installed..
6. restart your PC/Laptop.
7. Enjoy...