Loading raw image file

[Nulik Nol]

Hi,
I need Grub2 to load a large image file (which contains the executable
code  at a specified location above 1MB , and then jump to it in
protected mode. The image file is just plain executable code, does not
have any format or header (like a.out or elf). Is this possible ?
Also I would like to load this image file from usb or network. Can this be done?

Thanks in advance.
Nulik