XP reinstall on double boot machine: how to repair GRUB?

[GreatBunzinni]

I have a system which has XP and Kubuntu installed. Now I'm faced with the task of reinstalling XP from scratch (damn spyware/trojans). As a result, as a XP reinstall will end up screwing up GRUB I will need to repair that to be able to access my sweet sweet Kubuntu install.

So, what will I need to do to repair GRUB after a XP reinstall?

[penguin.ch]

Re: XP reinstall on double boot machine: how to repair GRUB?

I'd suggest backing up the master boot record (to the Linux partition, of course) and restore it once XP is up again - approximately as follows:

- Backup: sudo dd if=/dev/hda of=/root/mbr.bck bs=512 count=1
- Restore: sudo dd if=/root/mbr.bck of=/dev/hda bs=512 count=1

But, please, make sure you get the point I'm driving at; deny yourself to merely "copy & paste" (unless you're brave ...).

[GreatBunzinni]

Re: XP reinstall on double boot machine: how to repair GRUB?

I see what you mean. But isn't there some sort of automated way to do that? Like popping in the Install CD and repairing grub?