Laptop Dell Inspiron 1501.

I had a dual boot on this laptop between Ubuntu 10.10 and WinXP.
Now I tried the latest Ubuntu 14.10 and by mistake put it's Grub in the MBR and since I could't get a wireless out of it ,I removed it and yes,of course-no nothing anymore.
Realizing my mistake, I put in a small Ubuntu 10.10 root partition and put it's grub in the MBR.
So far,so good. Now how do I put the grub bootloader back in my full Ubuntu partition and in the MBR so I can delete that small Ubuntu partition that has no use for me except the fact it boots my whole system?
Here is my fdisk -l

Disk /dev/sda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xd0f4738c

Device Boot Start End Blocks Id System
/dev/sda1 1 14 112423+ de Dell Utility
/dev/sda2 * 15 8482 68011193 7 HPFS/NTFS
/dev/sda3 8482 14202 45945857 5 Extended
/dev/sda4 14202 14594 3149272 db CP/M / CTOS / ...
/dev/sda5 * 10160 11196 8321024 83 Linux
/dev/sda6 11196 11578 3072000 82 Linux swap / Solaris
/dev/sda7 11578 14202 21071872 83 Linux
/dev/sda8 9757 10160 3236864 83 Linux
/dev/sda9 8482 9756 10240234+ 83 Linux

I know it should be quite simple but I am still at a loss.