GRUB file not found?

[Infernochaos]

I know this has been asked a lot of times but my problems is a little different?

I gave sda1-2 for windows and sda 3-4-5 on an extended partition for my linux OS.
I installed ubuntu on sda 7 (when I go into disk utilities it shows up as sda 7 idk why) alongside another ubuntu on sda 5 ( EXTENDEDPARTITION : sda 5-6-7 ) so I could remove mandriva bootloader.Since I did, I removed ubuntu (sda 7) since it wasn't necessary but after it gave me the grub file not found.Obviously yes, since GRUB was installed from sda 7 but i have another grub.conf on sda 5 and I would like to know how to change the path of the grub reader to sda 5? or must I install all over again de grub loader?

Thank you.

[devils casper]

Which version of Ubuntu are you using?

If /dev/sda5 has grub.conf file, you haven't installed latest version of Ubuntu. Latest versions have GRUB2 instead of GRUB Legacy.

Anyways, boot up from Ubuntu LiveCD, open Terminal and execute this

sudo grub

You will get a grub prompt, grub>
Execute this:

root (hd0,5)
setup (hd0)
quit

Reboot machine.