Reinstall grub

[Kangarooo]

PC1 had drives
a with grub and ubuntu 9.04
b ubuntu distro 9.04 w/o grub

now i want drive b in PC2
but since it doesnt have grub then how can i get it in drive b?
i can put drive b in PC3 witch has drive c with grub 2 and xubuntu 10.04
maybe from it i can also make drive b bootable?

[oldfred]

From a liveCD, just be sure to follow the directions for old grub:

How to restore the Ubuntu/XP/Vista/7 bootloader (Updated for Ubuntu 9.10)
http://ubuntuforums.org/showthread.php?t=1014708

If you can boot into the install in your drive just reinstall grub from that to sdb, if it is sdb.

This is to refresh your GRUB files in /boot/grub and re-install GRUB to MBR.
sudo grub-install /dev/sdb
This is to automatically generate a new menu.lst file for you.
sudo update-grub