WARNING:::: DO NOT UPDATE

[Young]

This latest update is asking me a question I can't answer. I don't 
understand the implications.

It has apparently already done the update, so there's no backing out, to 
give me time to research.


The window is titled Debconf, the question is:
What would you like to do with menu.lst.

I know that menu.lst is used by Grub. I edited it to change the default 
to Windows, changed the pause time, and set it to update itself during 
upgrades. It worked during the last kernal upgrade. What's different 
about this one?

What do the choices mean?