If the linux partitions are intact, and your install disk lets you access the grub menu (probably by pressing the ESC key during the initial menu), then you can boot up your system and then run the grub-install program to rewrite to the MBR. The grub shell has auto-completion, which makes it easy locating the partition that has linux on it.
For example, enter "kernel (hd" and press the TAB key. Select a drive ( numbered from 0 ) and press tab again for a list of partitions. Keep going until you have your kernel selected. Do the same on another line starting with "initrd (hd". With both selected enter "boot" to boot up the system.
With the grub shell you could locate your /boot/grub/menu.lst file and boot with that.
You don't need to manually configure grub unless you also added or removed a disk and (hd1,1) is (hd0,1) or (hd2,1) now. You simply removed the MBR program that loaded the the grub boot loader. The /boot/grub/menu.lst is still there.
Last edited by jschiwal; 11-19-2006 at 05:18 AM.
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