And a warm welcome to LQ.
Normally it NOT a mistake to let Linux installers put GRUB in the MBR. Usually they detect M$ installation(s) & write the appropriate stanzas (entries) in
menu.lst.
Start by comparing
Nylex's
menu.lst to your own & see if you can fix this yourself. You don't say that you can't boot Linux so I assume you can. I also assume you are using Ubuntu, as indicated in your profile.
cd to
/boot/grub & using
sudo edit
menu.lst. The commands might look like this:
Code:
cd /boot/grub
cp menu.lst menu.lst.000
sudo <your_favorite_editor> menu.lst
If that doesn't work, then it's time to take
pixellany's advice & post the output of
fdisk -l. To that I suggest adding the XP stanza from your
menu.lst. These would go well in LQ forum "Code:" blocks -- find the "#" icon above the text entry area.
BTW, which "Ubuntu rev. 6" are you actually using: 6.06, Dapper Drake; or 6.10, Edgy Eft?
I hope this doesn't seem like piling on, but there is another reason for not posting your e-address: all LQ answers are supposed to be posted publicly in the forum areas so everyone can benefit form them.