May I have GRUB2 Menu's "My way"?

[Richard Owlett]

I am doing a series of experimental *nix installs.
At the moment most are not only the same lineage (Debian 
Linux) but the same generation (6.0.3). What is important 
*TO ME* what options I chose during install &/or adjustments 
I made after installation.

Questions:
1. Where does Grub2 get the information that is eventually 
displayed on the boot menu?
2. Is there any way I can force an association between 
displayed menu entry and an executable residing on a 
specific partition?
3. What should I be reading that I haven't discovered [yet;] ?

TIA