Can't get grub2 installed in debian-business cared(lenny)

[Thomas Yao <t.yao426@gmail.com>]

Hi all, I'm tring to install Debian Squeeze via "expert install" of
Debian Business Card(Lenny)
Everything went well until grub installation, I selected the grub2 to
install with Squeeze but no matter which device I tried to select to
install the boot loader, it told me "didn't select any device to
install bootloader"
And I can't install grub legancy afterwards, and I don't want to use
LILO, so anyone here met the same problem before? Thank you!

-- 
@ghosTM55
Mechanism, not policy