Bug#487755: squeeze grub problems

[Kostenzer]

I’m a newbee
I use linux so now an then.
My system:
/dev/sda1 xp -1- primary
/dev/sda2 xp -2- primay
/dev/sda3 extended
there is no /dev/sda4
/dev/sda5 ntsf data
/dev/sda6 ntsf data
/dev/sda7 fat 32 data
/dev/sda8 swap
/dev/sda9 ext3 ment for squeze

For years I use osl2000 bootmanager. Just perfect for me.
OSL2000 hides the not active primary partitions. So xp -1- can’t see or 
access xp -2- and the other way round. Just what I want.
On /dev/sda9 -/dev/hdc9- I installed lenny and grub. Worked great. Grub 
was just for linux and came after osl2000.

Now I wanted to put squeeze on it. Problems began.
It is a pitty that the bootmanager is installed in the last steps. Just 
after that you find out that the installation can’t be accessed an you 
can start over again.
Missing operating system is the message.

My trials:
Over a rescue cd, I thought the command was:
sudo grub-install --force /dev/sda9
just warnings but no result.

A not clean install or clean install, grub legacy or grub2, no 
difference: Missing operating system (4 times installing, costs a lot of 
time)
Then installing lenny again. /dev/hdc9. Grub2 same problems: Missing 
operating system. Grub legacy works immediately fine.
Even after upgrading 
(http://www.go2linux.org/how-to-upgrade-from-debian-lenny-to-squeeze)
grub was changed in grub2. Grub2 and squeeze work both. But now there is 
no network access anymore. Work to do.

So I think the installing of grub2 is not bug free. Installing Grub 
under squeeze is also not bug free.
There are warnings if grub is not installed in mbr. I have not enough 
knowledge, but if it works after upgrading, why it is not recommended?
If I remember good,there was also a warning it would make the system slower.
When? During booting or overall? In the first case, no problem. In the 
second case. I didn’t notice. (After the upgrading)

My Question:
Is there a way to install squeeze and grub or grub2 correctly on hda9 
without upgrading from lenny?