Grub does not want to boot my Ubuntu

[N. Spohrer]

Hello. I deleted some partitions with the ubuntu live-cd and the numbers 
for my ubuntu partitions changed. Grub didn't work. I booted with the 
live-cd, mounted my sda9 (ubuntu-/) and live-cd /dev into /mnt/ubuntu 
(dev in ./dev of course!). Then I chrooted into /mnt/ubuntu and mounted 
my extra sda6-/boot-Partition. Then I installed grub with
grub-install /dev/sda
And grub worked. But in the menu.lst still are the old partition-numbers 
and grub does not want to boot my Edgy.
old:
sda?=/boot
sda9=/home
sda11=/
new:
sda6=/boot
sda7=/home
sda9=/
What shall I do? My windows still works (on sda2...). And in the 
chroot-environment "mount" says that
-sda11 (which doesnt exist in /dev) is mounted on / (hmpf, owned...)
-sda6 is mounted THREE times on /boot
and my system seams rean-only (thats what nano and vim say...)

I have (again^^) no idea what to do....

greetings (I'm not able to sign the message atm because I don't want to 
install enigmail on w**.)