[orca-list] OT - grub help

["Glenn" <GlennErvin cableone net>]

Hi,
I hope everyone does not mind a quick off-topic question, and replies may be 
sent off-list...
glennervin cableone net
Anyway, I have a duel-boot system with XP and Ubuntu 10.04 Lucid LTS.
Anyway, I need to reinstall XP after backing up my critical files, and 
Windows will no doubt wipe out the MBR along with Grub2, so I am wondering 
how to access it .
I think I will need to reinstall Grub from a live CD or my thumb drive with 
Ubuntu 10.10.
Seems like I had trouble with this before, and I am wondering about 
permissions for writing to /dev/sda and any other problems that may occur, 
and if it would help to do some things first, like downloading a copy of 
Grub first, and run that install package.
Thanks for any help.

Glenn