Force location of GRUB's boot and core images ?

[Pascal Hambourg]

Hello,

In some cases I would need to force installation of GRUB's boot and core 
images into a specific location on the drive instead of letting 
grub-install decide automatically.

For example :
- install the boot image in the first sector of an unformatted partition
- install the core image in the second and next sectors of that partition.

Is this possible through any undocumented options or internal commands ?

At the moment the only way that approaches what I need is tu use a 
partition type such as btrfs which supports embedding, but this is 
overkill as it requires btrfs-tools to be installed and a ridiculously 
huge minimal partition size.

(Please CC me as I have limited access to the list)